diff --git a/CHANGELOG.md b/CHANGELOG.md
index dd74a5561..e9a04fcc4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -28,6 +28,7 @@ All notable changes to this project will be documented in this file.
 - Nullpointer on recent searches loader
 - [#2177] Leftover process when invalid SWF opened - now main window is shown
 - Opening files with "Open with FFDec" on windows did not use same instance
+- [#2183] AS1/2 Direct editation - case sensitive identifiers since SWF version 7
 
 ### Changed
 - [#2185] MochiCrypt no longer offered for auto decrypt, user needs to choose variant from "Use unpacker" menu
@@ -3386,6 +3387,7 @@ Major version of SWF to XML export changed to 2.
 [#2175]: https://www.free-decompiler.com/flash/issues/2175
 [#2178]: https://www.free-decompiler.com/flash/issues/2178
 [#2177]: https://www.free-decompiler.com/flash/issues/2177
+[#2183]: https://www.free-decompiler.com/flash/issues/2183
 [#2100]: https://www.free-decompiler.com/flash/issues/2100
 [#2123]: https://www.free-decompiler.com/flash/issues/2123
 [#2119]: https://www.free-decompiler.com/flash/issues/2119
diff --git a/libsrc/ffdec_lib/lexers/actionscript_script.flex b/libsrc/ffdec_lib/lexers/actionscript_script.flex
index 5cdf6dd24..a262f7410 100644
--- a/libsrc/ffdec_lib/lexers/actionscript_script.flex
+++ b/libsrc/ffdec_lib/lexers/actionscript_script.flex
@@ -38,6 +38,14 @@ import java.util.Stack;
 
     private int repeatNum = 1;
 
+    private boolean caseSensitiveIdentifiers = false;
+
+    public static final int SWF_VERSION_CASE_SENSITIVE = 7;
+
+    public void setCaseSensitiveIdentifiers(boolean val) {
+        this.caseSensitiveIdentifiers = val;
+    }
+
     public int yychar() {
         return yychar;
     }
@@ -182,97 +190,143 @@ Preprocessor = \u00A7\u00A7 {Identifier}
   "this"                         { return new ParsedSymbol(SymbolGroup.KEYWORD, SymbolType.THIS, yytext()); }
   "true"                         { return new ParsedSymbol(SymbolGroup.KEYWORD, SymbolType.TRUE, yytext()); }
   /* getURL */ 
-  [gG][eE][tT][uU][rR][lL]                                                        { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.GETURL, yytext()); }
+  [gG][eE][tT][uU][rR][lL]                                                        { if (caseSensitiveIdentifiers && !"getURL".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.GETURL, yytext()); }
   /* trace */ 
-  [tT][rR][aA][cC][eE]                                                            { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.TRACE, yytext()); }
+  [tT][rR][aA][cC][eE]                                                            { if (caseSensitiveIdentifiers && !"trace".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.TRACE, yytext()); }
   /* gotoAndStop */ 
-  [gG][oO][tT][oO][aA][nN][dD][sS][tT][oO][pP]                                    { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.GOTOANDSTOP, yytext()); }
+  [gG][oO][tT][oO][aA][nN][dD][sS][tT][oO][pP]                                    { if (caseSensitiveIdentifiers && !"gotoAndStop".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.GOTOANDSTOP, yytext()); }
   /* nextFrame */ 
-  [nN][eE][xX][tT][fF][rR][aA][mM][eE]                                            { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.NEXTFRAME, yytext()); }
+  [nN][eE][xX][tT][fF][rR][aA][mM][eE]                                            { if (caseSensitiveIdentifiers && !"nextFrame".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.NEXTFRAME, yytext()); }
   /* play */ 
-  [pP][lL][aA][yY]                                                                { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.PLAY, yytext()); }
+  [pP][lL][aA][yY]                                                                { if (caseSensitiveIdentifiers && !"play".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.PLAY, yytext()); }
   /* prevFrame */ 
-  [pP][rR][eE][vV][fF][rR][aA][mM][eE]                                            { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.PREVFRAME, yytext()); }
+  [pP][rR][eE][vV][fF][rR][aA][mM][eE]                                            { if (caseSensitiveIdentifiers && !"prevFrame".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.PREVFRAME, yytext()); }
   /* tellTarget */ 
-  [tT][eE][lL][lL][tT][aA][rR][gG][eE][tT]                                        { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.TELLTARGET, yytext()); }
+  [tT][eE][lL][lL][tT][aA][rR][gG][eE][tT]                                        { if (caseSensitiveIdentifiers && !"tellTarget".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.TELLTARGET, yytext()); }
   /* stop */ 
-  [sS][tT][oO][pP]                                                                { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.STOP, yytext()); }
+  [sS][tT][oO][pP]                                                                { if (caseSensitiveIdentifiers && !"stop".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.STOP, yytext()); }
   /* stopAllSounds */ 
-  [sS][tT][oO][pP][aA][lL][lL][sS][oO][uU][nN][dD][sS]                            { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.STOPALLSOUNDS, yytext()); }
+  [sS][tT][oO][pP][aA][lL][lL][sS][oO][uU][nN][dD][sS]                            { if (caseSensitiveIdentifiers && !"stopAllSounds".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.STOPALLSOUNDS, yytext()); }
   /* toggleHighQuality */ 
-  [tT][oO][gG][gG][lL][eE][hH][iI][gG][hH][qQ][uU][aA][lL][iI][tT][yY]            { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.TOGGLEHIGHQUALITY, yytext()); }
+  [tT][oO][gG][gG][lL][eE][hH][iI][gG][hH][qQ][uU][aA][lL][iI][tT][yY]            { if (caseSensitiveIdentifiers && !"toggleHighQuality".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.TOGGLEHIGHQUALITY, yytext()); }
   /* ifFrameLoaded */ 
-  [iI][fF][fF][rR][aA][mM][eE][lL][oO][aA][dD][eE][dD]                            { return new ParsedSymbol(SymbolGroup.KEYWORD, SymbolType.IFFRAMELOADED, yytext()); }
+  [iI][fF][fF][rR][aA][mM][eE][lL][oO][aA][dD][eE][dD]                            { if (caseSensitiveIdentifiers && !"ifFrameLoaded".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.KEYWORD, SymbolType.IFFRAMELOADED, yytext()); }
   /* ord */ 
-  [oO][rR][dD]                                                                    { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.ORD, yytext()); }
+  [oO][rR][dD]                                                                    { if (caseSensitiveIdentifiers && !"ord".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.ORD, yytext()); }
   /* chr */ 
-  [cC][hH][rR]                                                                    { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.CHR, yytext()); }
+  [cC][hH][rR]                                                                    { if (caseSensitiveIdentifiers && !"chr".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.CHR, yytext()); }
   /* duplicateMovieClip */ 
-  [dD][uU][pP][lL][iI][cC][aA][tT][eE][mM][oO][vV][iI][eE][cC][lL][iI][pP]        { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.DUPLICATEMOVIECLIP, yytext()); }
+  [dD][uU][pP][lL][iI][cC][aA][tT][eE][mM][oO][vV][iI][eE][cC][lL][iI][pP]        { if (caseSensitiveIdentifiers && !"duplicateMovieClip".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.DUPLICATEMOVIECLIP, yytext()); }
   /* stopDrag */ 
-  [sS][tT][oO][pP][dD][rR][aA][gG]                                                { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.STOPDRAG, yytext()); }
+  [sS][tT][oO][pP][dD][rR][aA][gG]                                                { if (caseSensitiveIdentifiers && !"stopDrag".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.STOPDRAG, yytext()); }
   /* getTimer */ 
-  [gG][eE][tT][tT][iI][mM][eE][rR]                                                { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.GETTIMER, yytext()); }
+  [gG][eE][tT][tT][iI][mM][eE][rR]                                                { if (caseSensitiveIdentifiers && !"getTimer".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.GETTIMER, yytext()); }
   /* loadVariables */ 
-  [lL][oO][aA][dD][vV][aA][rR][iI][aA][bB][lL][eE][sS]                            { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.LOADVARIABLES, yytext()); }
+  [lL][oO][aA][dD][vV][aA][rR][iI][aA][bB][lL][eE][sS]                            { if (caseSensitiveIdentifiers && !"loadVariables".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.LOADVARIABLES, yytext()); }
   /* loadMovie */ 
-  [lL][oO][aA][dD][mM][oO][vV][iI][eE]                                            { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.LOADMOVIE, yytext()); }
+  [lL][oO][aA][dD][mM][oO][vV][iI][eE]                                            { if (caseSensitiveIdentifiers && !"loadMovie".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.LOADMOVIE, yytext()); }
   /* gotoAndPlay */ 
-  [gG][oO][tT][oO][aA][nN][dD][pP][lL][aA][yY]                                    { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.GOTOANDPLAY, yytext()); }
+  [gG][oO][tT][oO][aA][nN][dD][pP][lL][aA][yY]                                    { if (caseSensitiveIdentifiers && !"gotoAndPlay".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.GOTOANDPLAY, yytext()); }
   /* mbord */ 
-  [mM][bB][oO][rR][dD]                                                            { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.MBORD, yytext()); }
+  [mM][bB][oO][rR][dD]                                                            { if (caseSensitiveIdentifiers && !"mbord".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.MBORD, yytext()); }
   /* mbchr */ 
-  [mM][bB][cC][hH][rR]                                                            { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.MBCHR, yytext()); }
+  [mM][bB][cC][hH][rR]                                                            { if (caseSensitiveIdentifiers && !"mbchr".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.MBCHR, yytext()); }
   /* mblength */ 
-  [mM][bB][lL][eE][nN][gG][tT][hH]                                                { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.MBLENGTH, yytext()); }
+  [mM][bB][lL][eE][nN][gG][tT][hH]                                                { if (caseSensitiveIdentifiers && !"mblength".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.MBLENGTH, yytext()); }
   /* mbsubstring */ 
-  [mM][bB][sS][uU][bB][sS][tT][rR][iI][nN][gG]                                    { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.MBSUBSTRING, yytext()); }
+  [mM][bB][sS][uU][bB][sS][tT][rR][iI][nN][gG]                                    { if (caseSensitiveIdentifiers && !"mbsubstring".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.MBSUBSTRING, yytext()); }
   /* random */ 
-  [rR][aA][nN][dD][oO][mM]                                                        { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.RANDOM, yytext()); }
+  [rR][aA][nN][dD][oO][mM]                                                        { if (caseSensitiveIdentifiers && !"random".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.RANDOM, yytext()); }
   /* removeMovieClip */ 
-  [rR][eE][mM][oO][vV][eE][mM][oO][vV][iI][eE][cC][lL][iI][pP]                    { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.REMOVEMOVIECLIP, yytext()); }
+  [rR][eE][mM][oO][vV][eE][mM][oO][vV][iI][eE][cC][lL][iI][pP]                    { if (caseSensitiveIdentifiers && !"removeMovieClip".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.REMOVEMOVIECLIP, yytext()); }
   /* startDrag */ 
-  [sS][tT][aA][rR][tT][dD][rR][aA][gG]                                            { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.STARTDRAG, yytext()); }
+  [sS][tT][aA][rR][tT][dD][rR][aA][gG]                                            { if (caseSensitiveIdentifiers && !"startDrag".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.STARTDRAG, yytext()); }
   /* substr */ 
-  [sS][uU][bB][sS][tT][rR]                                                        { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.SUBSTR, yytext()); }
+  [sS][uU][bB][sS][tT][rR]                                                        { if (caseSensitiveIdentifiers && !"substr".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.SUBSTR, yytext()); }
   /* length */ 
-  [lL][eE][nN][gG][tT][hH]                                                        { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.LENGTH, yytext()); }
+  [lL][eE][nN][gG][tT][hH]                                                        { if (caseSensitiveIdentifiers && !"length".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.LENGTH, yytext()); }
   /* int */ 
-  [iI][nN][tT]                                                                    { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.INT, yytext()); }
+  [iI][nN][tT]                                                                    { if (caseSensitiveIdentifiers && !"int".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.INT, yytext()); }
   /* targetPath */ 
-  [tT][aA][rR][gG][eE][tT][pP][aA][tT][hH]                                        { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.TARGETPATH, yytext()); }
+  [tT][aA][rR][gG][eE][tT][pP][aA][tT][hH]                                        { if (caseSensitiveIdentifiers && !"targetPath".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.TARGETPATH, yytext()); }
   /* Number */ 
-  [nN][uU][mM][bB][eE][rR]                                                        { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.NUMBER_OP, yytext()); }
+  [nN][uU][mM][bB][eE][rR]                                                        { if (caseSensitiveIdentifiers && !"Number".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.NUMBER_OP, yytext()); }
   /* String */ 
-  [sS][tT][rR][iI][nN][gG]                                                        { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.STRING_OP, yytext()); }
+  [sS][tT][rR][iI][nN][gG]                                                        { if (caseSensitiveIdentifiers && !"String".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.STRING_OP, yytext()); }
   /* eval */ 
-  [eE][vV][aA][lL]                                                                { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.EVAL, yytext()); }
+  [eE][vV][aA][lL]                                                                { if (caseSensitiveIdentifiers && !"eval".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.EVAL, yytext()); }
   /* undefined */ 
-  [uU][nN][dD][eE][fF][iI][nN][eE][dD]                                            { return new ParsedSymbol(SymbolGroup.GLOBALCONST, SymbolType.UNDEFINED, yytext()); }
+  [uU][nN][dD][eE][fF][iI][nN][eE][dD]                                            { if (caseSensitiveIdentifiers && !"undefined".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALCONST, SymbolType.UNDEFINED, yytext()); }
   /* newline */ 
-  [nN][eE][wW][lL][iI][nN][eE]                                                    { return new ParsedSymbol(SymbolGroup.GLOBALCONST, SymbolType.NEWLINE, yytext()); }
+  [nN][eE][wW][lL][iI][nN][eE]                                                    { if (caseSensitiveIdentifiers && !"newline".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALCONST, SymbolType.NEWLINE, yytext()); }
   /* getVersion */ 
-  [gG][eE][tT][vV][eE][rR][sS][iI][oO][nN]                                        { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.GETVERSION, yytext()); }
+  [gG][eE][tT][vV][eE][rR][sS][iI][oO][nN]                                        { if (caseSensitiveIdentifiers && !"getVersion".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.GETVERSION, yytext()); }
   /* call */ 
-  [cC][aA][lL][lL]                                                                { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.CALL, yytext()); }
+  [cC][aA][lL][lL]                                                                { if (caseSensitiveIdentifiers && !"call".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.CALL, yytext()); }
   /* loadMovieNum */ 
-  [lL][oO][aA][dD][mM][oO][vV][iI][eE][nN][uU][mM]                                { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.LOADMOVIENUM, yytext()); }
+  [lL][oO][aA][dD][mM][oO][vV][iI][eE][nN][uU][mM]                                { if (caseSensitiveIdentifiers && !"loadMovieNum".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.LOADMOVIENUM, yytext()); }
   /* loadVariablesNum */ 
-  [lL][oO][aA][dD][vV][aA][rR][iI][aA][bB][lL][eE][sS][nN][uU][mM]                { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.LOADVARIABLESNUM, yytext()); }
+  [lL][oO][aA][dD][vV][aA][rR][iI][aA][bB][lL][eE][sS][nN][uU][mM]                { if (caseSensitiveIdentifiers && !"loadVariablesNum".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.LOADVARIABLESNUM, yytext()); }
   /* printAsBitmapNum */ 
-  [pP][rR][iI][nN][tT][aA][sS][bB][iI][tT][mM][aA][pP][nN][uU][mM]                { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.PRINTASBITMAPNUM, yytext()); }
+  [pP][rR][iI][nN][tT][aA][sS][bB][iI][tT][mM][aA][pP][nN][uU][mM]                { if (caseSensitiveIdentifiers && !"printAsBitmapNum".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.PRINTASBITMAPNUM, yytext()); }
   /* printNum */ 
-  [pP][rR][iI][nN][tT][nN][uU][mM]                                                { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.PRINTNUM, yytext()); }
+  [pP][rR][iI][nN][tT][nN][uU][mM]                                                { if (caseSensitiveIdentifiers && !"printNum".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.PRINTNUM, yytext()); }
   /* printAsBitmap */ 
-  [pP][rR][iI][nN][tT][aA][sS][bB][iI][tT][mM][aA][pP]                            { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.PRINTASBITMAP, yytext()); }
+  [pP][rR][iI][nN][tT][aA][sS][bB][iI][tT][mM][aA][pP]                            { if (caseSensitiveIdentifiers && !"printAsBitmap".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.PRINTASBITMAP, yytext()); }
   /* print */ 
-  [pP][rR][iI][nN][tT]                                                            { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.PRINT, yytext()); }
+  [pP][rR][iI][nN][tT]                                                            { if (caseSensitiveIdentifiers && !"print".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.PRINT, yytext()); }
   /* unloadMovie */ 
-  [uU][nN][lL][oO][aA][dD][mM][oO][vV][iI][eE]                                    { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.UNLOADMOVIE, yytext()); }
+  [uU][nN][lL][oO][aA][dD][mM][oO][vV][iI][eE]                                    { if (caseSensitiveIdentifiers && !"unloadMovie".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.UNLOADMOVIE, yytext()); }
   /* unloadMovieNum */ 
-  [uU][nN][lL][oO][aA][dD][mM][oO][vV][iI][eE][nN][uU][mM]                        { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.UNLOADMOVIENUM, yytext()); }
+  [uU][nN][lL][oO][aA][dD][mM][oO][vV][iI][eE][nN][uU][mM]                        { if (caseSensitiveIdentifiers && !"unloadMovieNum".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.UNLOADMOVIENUM, yytext()); }
   /* fscommand */ 
-  [fF][sS][cC][oO][mM][mM][aA][nN][dD]                                            { return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.FSCOMMAND, yytext()); }
+  [fF][sS][cC][oO][mM][mM][aA][nN][dD]                                            { if (caseSensitiveIdentifiers && !"fscommand".equals(yytext())) return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext()); 
+                                                                                    return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.FSCOMMAND, yytext()); }
   
 
 /* operators */
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/parser/script/ActionScript2Parser.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/parser/script/ActionScript2Parser.java
index d7df0e90d..627195c30 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/parser/script/ActionScript2Parser.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/parser/script/ActionScript2Parser.java
@@ -175,8 +175,8 @@ import java.util.Map;
  *
  * @author JPEXS
  */
-public class ActionScript2Parser {
-
+public class ActionScript2Parser {   
+    
     public static final List<String> BUILTIN_CASTS = Arrays.asList(new String[]{
         "flash.display.BitmapData",
         "flash.external.ExternalInterface",
@@ -2107,6 +2107,9 @@ public class ActionScript2Parser {
         List<GraphTargetItem> retTree = new ArrayList<>();
         this.constantPool = constantPool;
         lexer = new ActionScriptLexer(new StringReader(str));
+        if (swfVersion >= ActionScriptLexer.SWF_VERSION_CASE_SENSITIVE) {
+            lexer.setCaseSensitiveIdentifiers(true);
+        }
 
         BUTTONCONDACTION newButtonCond = new BUTTONCONDACTION();
 
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/parser/script/ActionScriptLexer.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/parser/script/ActionScriptLexer.java
index 1eb0a74e0..ff986a92b 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/parser/script/ActionScriptLexer.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/parser/script/ActionScriptLexer.java
@@ -1,16 +1,18 @@
-/*
- *  Copyright (C) 2010-2023 JPEXS, All rights reserved.
- * 
+/* The following code was generated by JFlex 1.6.0 */
+
+ /*
+ *  Copyright (C) 2010-2016 JPEXS, All rights reserved.
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 3.0 of the License, or (at your option) any later version.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library.
  */
@@ -84,159 +86,165 @@ public final class ActionScriptLexer {
             + "\1\6\17\0\1\7\1\6\1\7\36\6\33\7\2\0\131\6\13\7"
             + "\1\6\16\0\12\7\41\6\11\7\2\6\4\0\1\6\2\0\1\7"
             + "\30\6\4\7\1\6\11\7\1\6\3\7\1\6\5\7\22\0\31\6"
-            + "\3\7\4\0\13\6\65\0\25\6\1\0\22\6\13\0\61\7\66\6"
-            + "\3\7\1\6\22\7\1\6\7\7\12\6\2\7\2\0\12\7\1\0"
-            + "\20\6\3\7\1\0\10\6\2\0\2\6\2\0\26\6\1\0\7\6"
-            + "\1\0\1\6\3\0\4\6\2\0\1\7\1\6\7\7\2\0\2\7"
-            + "\2\0\3\7\1\6\10\0\1\7\4\0\2\6\1\0\3\6\2\7"
-            + "\2\0\12\7\4\6\7\0\2\6\1\0\1\7\2\0\3\7\1\0"
-            + "\6\6\4\0\2\6\2\0\26\6\1\0\7\6\1\0\2\6\1\0"
-            + "\2\6\1\0\2\6\2\0\1\7\1\0\5\7\4\0\2\7\2\0"
-            + "\3\7\3\0\1\7\7\0\4\6\1\0\1\6\7\0\14\7\3\6"
-            + "\1\7\13\0\3\7\1\0\11\6\1\0\3\6\1\0\26\6\1\0"
-            + "\7\6\1\0\2\6\1\0\5\6\2\0\1\7\1\6\10\7\1\0"
-            + "\3\7\1\0\3\7\2\0\1\6\17\0\2\6\2\7\2\0\12\7"
-            + "\1\0\1\6\7\0\1\6\6\7\1\0\3\7\1\0\10\6\2\0"
-            + "\2\6\2\0\26\6\1\0\7\6\1\0\2\6\1\0\5\6\2\0"
-            + "\1\7\1\6\7\7\2\0\2\7\2\0\3\7\7\0\3\7\4\0"
-            + "\2\6\1\0\3\6\2\7\2\0\12\7\1\0\1\6\20\0\1\7"
-            + "\1\6\1\0\6\6\3\0\3\6\1\0\4\6\3\0\2\6\1\0"
-            + "\1\6\1\0\2\6\3\0\2\6\3\0\3\6\3\0\14\6\4\0"
-            + "\5\7\3\0\3\7\1\0\4\7\2\0\1\6\6\0\1\7\16\0"
-            + "\12\7\11\0\1\6\6\0\5\7\10\6\1\0\3\6\1\0\27\6"
-            + "\1\0\20\6\3\0\1\6\7\7\1\0\3\7\1\0\4\7\7\0"
-            + "\2\7\1\0\3\6\5\0\2\6\2\7\2\0\12\7\20\0\1\6"
-            + "\3\7\1\0\10\6\1\0\3\6\1\0\27\6\1\0\12\6\1\0"
-            + "\5\6\2\0\1\7\1\6\7\7\1\0\3\7\1\0\4\7\7\0"
-            + "\2\7\7\0\1\6\1\0\2\6\2\7\2\0\12\7\1\0\2\6"
-            + "\15\0\4\7\11\6\1\0\3\6\1\0\51\6\2\7\1\6\7\7"
-            + "\1\0\3\7\1\0\4\7\1\6\5\0\3\6\1\7\7\0\3\6"
-            + "\2\7\2\0\12\7\12\0\6\6\1\0\3\7\1\0\22\6\3\0"
-            + "\30\6\1\0\11\6\1\0\1\6\2\0\7\6\3\0\1\7\4\0"
-            + "\6\7\1\0\1\7\1\0\10\7\6\0\12\7\2\0\2\7\15\0"
-            + "\60\6\1\7\2\6\7\7\4\0\10\6\10\7\1\0\12\7\47\0"
-            + "\2\6\1\0\1\6\1\0\5\6\1\0\30\6\1\0\1\6\1\0"
-            + "\12\6\1\7\2\6\11\7\1\6\2\0\5\6\1\0\1\6\1\0"
-            + "\6\7\2\0\12\7\2\0\4\6\40\0\1\6\27\0\2\7\6\0"
-            + "\12\7\13\0\1\7\1\0\1\7\1\0\1\7\4\0\2\7\10\6"
-            + "\1\0\44\6\4\0\24\7\1\0\2\7\5\6\13\7\1\0\44\7"
-            + "\11\0\1\7\71\0\53\6\24\7\1\6\12\7\6\0\6\6\4\7"
-            + "\4\6\3\7\1\6\3\7\2\6\7\7\3\6\4\7\15\6\14\7"
-            + "\1\6\17\7\2\0\46\6\1\0\1\6\5\0\1\6\2\0\53\6"
-            + "\1\0\u014d\6\1\0\4\6\2\0\7\6\1\0\1\6\1\0\4\6"
-            + "\2\0\51\6\1\0\4\6\2\0\41\6\1\0\4\6\2\0\7\6"
-            + "\1\0\1\6\1\0\4\6\2\0\17\6\1\0\71\6\1\0\4\6"
-            + "\2\0\103\6\2\0\3\7\40\0\20\6\20\0\126\6\2\0\6\6"
-            + "\3\0\u026c\6\2\0\21\6\1\0\32\6\5\0\113\6\3\0\13\6"
-            + "\7\0\15\6\1\0\4\6\3\7\13\0\22\6\3\7\13\0\22\6"
-            + "\2\7\14\0\15\6\1\0\3\6\1\0\2\7\14\0\64\6\40\7"
-            + "\3\0\1\6\3\0\2\6\1\7\2\0\12\7\41\0\4\7\1\0"
-            + "\12\7\6\0\131\6\7\0\5\6\2\7\42\6\1\7\1\6\5\0"
-            + "\106\6\12\0\37\6\1\0\14\7\4\0\14\7\12\0\12\7\36\6"
-            + "\2\0\5\6\13\0\54\6\4\0\32\6\6\0\12\7\46\0\27\6"
-            + "\5\7\4\0\65\6\12\7\1\0\35\7\2\0\13\7\6\0\12\7"
-            + "\15\0\1\6\10\0\16\7\1\0\2\7\77\0\5\7\57\6\21\7"
-            + "\7\6\4\0\12\7\21\0\11\7\14\0\3\7\36\6\15\7\2\6"
-            + "\12\7\54\6\16\7\14\0\44\6\24\7\10\0\12\7\3\0\3\6"
-            + "\12\7\44\6\2\0\11\6\7\0\53\6\2\0\3\6\20\0\3\7"
-            + "\1\0\25\7\4\6\1\7\6\6\1\7\2\6\3\7\1\6\5\0"
-            + "\300\6\72\7\1\0\5\7\u0116\6\2\0\6\6\2\0\46\6\2\0"
-            + "\6\6\2\0\10\6\1\0\1\6\1\0\1\6\1\0\1\6\1\0"
-            + "\37\6\2\0\65\6\1\0\7\6\1\0\1\6\3\0\3\6\1\0"
-            + "\7\6\3\0\4\6\2\0\6\6\4\0\15\6\5\0\3\6\1\0"
-            + "\7\6\16\0\5\7\30\0\1\124\1\124\5\7\20\0\2\6\23\0"
-            + "\1\6\13\0\5\7\1\0\12\7\1\0\1\6\15\0\1\6\20\0"
-            + "\15\6\3\0\40\6\20\0\15\7\4\0\1\7\3\0\14\7\21\0"
-            + "\1\6\4\0\1\6\2\0\12\6\1\0\1\6\3\0\5\6\6\0"
-            + "\1\6\1\0\1\6\1\0\1\6\1\0\4\6\1\0\13\6\2\0"
-            + "\4\6\5\0\5\6\4\0\1\6\21\0\51\6\u0a77\0\57\6\1\0"
-            + "\57\6\1\0\205\6\6\0\4\6\3\7\2\6\14\0\46\6\1\0"
-            + "\1\6\5\0\1\6\2\0\70\6\7\0\1\6\17\0\1\7\27\6"
-            + "\11\0\7\6\1\0\7\6\1\0\7\6\1\0\7\6\1\0\7\6"
-            + "\1\0\7\6\1\0\7\6\1\0\7\6\1\0\40\7\57\0\1\6"
-            + "\u01d5\0\3\6\31\0\11\6\6\7\1\0\5\6\2\0\5\6\4\0"
-            + "\126\6\2\0\2\7\2\0\3\6\1\0\132\6\1\0\4\6\5\0"
-            + "\53\6\1\0\136\6\21\0\40\6\60\0\20\6\u0200\0\u19c0\6\100\0"
-            + "\u51fd\6\3\0\u048d\6\103\0\56\6\2\0\u010d\6\3\0\20\6\12\7"
-            + "\2\6\24\0\57\6\1\7\4\0\12\7\1\0\37\6\2\7\120\6"
-            + "\2\7\45\0\11\6\2\0\147\6\2\0\65\6\2\0\11\6\52\0"
-            + "\15\6\1\7\3\6\1\7\4\6\1\7\27\6\5\7\4\0\1\7"
-            + "\13\0\1\6\7\0\64\6\14\0\2\7\62\6\22\7\12\0\12\7"
-            + "\6\0\22\7\6\6\3\0\1\6\1\0\2\6\13\7\34\6\10\7"
-            + "\2\0\27\6\15\7\14\0\35\6\3\0\4\7\57\6\16\7\16\0"
-            + "\1\6\12\7\6\0\5\6\1\7\12\6\12\7\5\6\1\0\51\6"
-            + "\16\7\11\0\3\6\1\7\10\6\2\7\2\0\12\7\6\0\27\6"
-            + "\3\0\1\6\3\7\62\6\1\7\1\6\3\7\2\6\2\7\5\6"
-            + "\2\7\1\6\1\7\1\6\30\0\3\6\2\0\13\6\5\7\2\0"
-            + "\3\6\2\7\12\0\6\6\2\0\6\6\2\0\6\6\11\0\7\6"
-            + "\1\0\7\6\1\0\53\6\1\0\16\6\6\0\163\6\10\7\1\0"
-            + "\2\7\2\0\12\7\6\0\u2ba4\6\14\0\27\6\4\0\61\6\u2104\0"
-            + "\u016e\6\2\0\152\6\46\0\7\6\14\0\5\6\5\0\1\6\1\7"
-            + "\12\6\1\0\15\6\1\0\5\6\1\0\1\6\1\0\2\6\1\0"
-            + "\2\6\1\0\154\6\41\0\u016b\6\22\0\100\6\2\0\66\6\50\0"
-            + "\15\6\3\0\20\7\20\0\20\7\3\0\2\6\30\0\3\6\31\0"
-            + "\1\6\6\0\5\6\1\0\207\6\2\0\1\7\4\0\1\6\13\0"
-            + "\12\7\7\0\32\6\4\0\1\6\1\0\32\6\13\0\131\6\3\0"
-            + "\6\6\2\0\6\6\2\0\6\6\2\0\3\6\3\0\2\6\3\0"
-            + "\2\6\22\0\3\7\4\0\14\6\1\0\32\6\1\0\23\6\1\0"
-            + "\2\6\1\0\17\6\2\0\16\6\42\0\173\6\105\0\65\6\210\0"
-            + "\1\7\202\0\35\6\3\0\61\6\17\0\1\7\37\0\40\6\15\0"
-            + "\36\6\5\0\46\6\5\7\5\0\36\6\2\0\44\6\4\0\10\6"
-            + "\1\0\5\6\52\0\236\6\2\0\12\7\6\0\44\6\4\0\44\6"
-            + "\4\0\50\6\10\0\64\6\234\0\u0137\6\11\0\26\6\12\0\10\6"
-            + "\230\0\6\6\2\0\1\6\1\0\54\6\1\0\2\6\3\0\1\6"
-            + "\2\0\27\6\12\0\27\6\11\0\37\6\101\0\23\6\1\0\2\6"
-            + "\12\0\26\6\12\0\32\6\106\0\70\6\6\0\2\6\100\0\1\6"
-            + "\3\7\1\0\2\7\5\0\4\7\4\6\1\0\3\6\1\0\35\6"
-            + "\2\0\3\7\4\0\1\7\40\0\35\6\3\0\35\6\43\0\10\6"
-            + "\1\0\34\6\2\7\31\0\66\6\12\0\26\6\12\0\23\6\15\0"
-            + "\22\6\156\0\111\6\67\0\63\6\15\0\63\6\15\0\44\6\4\7"
-            + "\10\0\12\7\u0146\0\52\6\1\0\2\7\3\0\2\6\116\0\35\6"
-            + "\12\0\1\6\10\0\26\6\13\7\137\0\25\6\33\0\27\6\11\0"
-            + "\3\7\65\6\17\7\37\0\12\7\17\0\4\7\55\6\13\7\2\0"
-            + "\1\7\17\0\1\7\2\0\31\6\7\0\12\7\6\0\3\7\44\6"
-            + "\16\7\1\0\12\7\4\0\1\6\2\7\1\6\10\0\43\6\1\7"
-            + "\2\0\1\6\11\0\3\7\60\6\16\7\4\6\4\0\4\7\1\0"
-            + "\14\7\1\6\1\0\1\6\43\0\22\6\1\0\31\6\14\7\6\0"
-            + "\1\7\101\0\7\6\1\0\1\6\1\0\4\6\1\0\17\6\1\0"
-            + "\12\6\7\0\57\6\14\7\5\0\12\7\6\0\4\7\1\0\10\6"
-            + "\2\0\2\6\2\0\26\6\1\0\7\6\1\0\2\6\1\0\5\6"
-            + "\1\0\2\7\1\6\7\7\2\0\2\7\2\0\3\7\2\0\1\6"
-            + "\6\0\1\7\5\0\5\6\2\7\2\0\7\7\3\0\5\7\213\0"
-            + "\65\6\22\7\4\6\5\0\12\7\4\0\1\7\3\6\36\0\60\6"
-            + "\24\7\2\6\1\0\1\6\10\0\12\7\246\0\57\6\7\7\2\0"
-            + "\11\7\27\0\4\6\2\7\42\0\60\6\21\7\3\0\1\6\13\0"
-            + "\12\7\46\0\53\6\15\7\1\6\7\0\12\7\66\0\33\6\2\0"
-            + "\17\7\4\0\12\7\306\0\54\6\17\7\145\0\100\6\12\7\25\0"
-            + "\10\6\2\0\1\6\2\0\10\6\1\0\2\6\1\0\30\6\6\7"
-            + "\1\0\2\7\2\0\4\7\1\6\1\7\1\6\2\7\14\0\12\7"
-            + "\106\0\10\6\2\0\47\6\7\7\2\0\7\7\1\6\1\0\1\6"
-            + "\1\7\33\0\1\6\12\7\50\6\7\7\1\6\4\7\10\0\1\7"
-            + "\10\0\1\6\13\7\56\6\20\7\3\0\1\6\42\0\71\6\u0107\0"
-            + "\11\6\1\0\45\6\10\7\1\0\10\7\1\6\17\0\12\7\30\0"
-            + "\36\6\2\0\26\7\1\0\16\7\111\0\7\6\1\0\2\6\1\0"
-            + "\46\6\6\7\3\0\1\7\1\0\2\7\1\0\7\7\1\6\1\7"
-            + "\10\0\12\7\6\0\6\6\1\0\2\6\1\0\40\6\5\7\1\0"
-            + "\2\7\1\0\5\7\1\6\7\0\12\7\u0136\0\23\6\4\7\271\0"
-            + "\1\6\54\0\4\6\37\0\u039a\6\146\0\157\6\21\0\304\6\u0abc\0"
-            + "\u042f\6\1\0\11\7\u0fc7\0\u0247\6\u21b9\0\u0239\6\7\0\37\6\1\0"
-            + "\12\7\146\0\36\6\2\0\5\7\13\0\60\6\7\7\11\0\4\6"
-            + "\14\0\12\7\11\0\25\6\5\0\23\6\u02b0\0\100\6\200\0\113\6"
-            + "\4\0\1\7\1\6\67\7\7\0\4\7\15\6\100\0\2\6\1\0"
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             + "\13\0\7\7\51\0\104\6\7\7\1\6\4\0\12\7\u0356\0\1\6"
             + "\u014f\0\4\6\1\0\33\6\1\0\2\6\1\0\1\6\2\0\1\6"
             + "\1\0\12\6\1\0\4\6\1\0\1\6\1\0\1\6\6\0\1\6"
@@ -244,8 +252,8 @@ public final class ActionScriptLexer {
             + "\1\0\1\6\2\0\1\6\1\0\1\6\1\0\1\6\1\0\1\6"
             + "\1\0\1\6\1\0\2\6\1\0\1\6\2\0\4\6\1\0\7\6"
             + "\1\0\4\6\1\0\4\6\1\0\1\6\1\0\12\6\1\0\21\6"
-            + "\5\0\3\6\1\0\5\6\1\0\21\6\u0d34\0\12\7\u0406\0\ua6de\6"
-            + "\42\0\u1035\6\13\0\336\6\2\0\u1682\6\16\0\u1d31\6\u0c1f\0\u021e\6"
+            + "\5\0\3\6\1\0\5\6\1\0\21\6\u0d34\0\12\7\u0406\0\ua6e0\6"
+            + "\40\0\u1039\6\7\0\336\6\2\0\u1682\6\16\0\u1d31\6\u0c1f\0\u021e\6"
             + "\u05e2\0\u134b\6\uffff\0\uffff\0\uffff\0\uffff\0\uffff\0\uffff\0\uffff\0\uffff\0\uffff\0\uffff\0\uecc0\0"
             + "\1\7\36\0\140\7\200\0\360\7\uffff\0\uffff\0\ufe12\0";
 
@@ -1250,6 +1258,14 @@ public final class ActionScriptLexer {
 
     private int repeatNum = 1;
 
+    private boolean caseSensitiveIdentifiers = false;
+
+    public static final int SWF_VERSION_CASE_SENSITIVE = 7;
+
+    public void setCaseSensitiveIdentifiers(boolean val) {
+        this.caseSensitiveIdentifiers = val;
+    }
+
     public int yychar() {
         return yychar;
     }
@@ -1326,7 +1342,7 @@ public final class ActionScriptLexer {
         /* index in packed string  */
         int j = 0;
         /* index in unpacked array */
-        while (i < 3742) {
+        while (i < 3862) {
             int count = packed.charAt(i++);
             char value = packed.charAt(i++);
             do {
@@ -2071,6 +2087,9 @@ public final class ActionScriptLexer {
                 case 262:
                     break;
                 case 85: {
+                    if (caseSensitiveIdentifiers && !"chr".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.CHR, yytext());
                 }
                 case 263:
@@ -2081,6 +2100,9 @@ public final class ActionScriptLexer {
                 case 264:
                     break;
                 case 87: {
+                    if (caseSensitiveIdentifiers && !"ord".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.ORD, yytext());
                 }
                 case 265:
@@ -2096,6 +2118,9 @@ public final class ActionScriptLexer {
                 case 267:
                     break;
                 case 90: {
+                    if (caseSensitiveIdentifiers && !"int".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.INT, yytext());
                 }
                 case 268:
@@ -2141,6 +2166,9 @@ public final class ActionScriptLexer {
                 case 276:
                     break;
                 case 99: {
+                    if (caseSensitiveIdentifiers && !"eval".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.EVAL, yytext());
                 }
                 case 277:
@@ -2161,11 +2189,17 @@ public final class ActionScriptLexer {
                 case 280:
                     break;
                 case 103: {
+                    if (caseSensitiveIdentifiers && !"call".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.CALL, yytext());
                 }
                 case 281:
                     break;
                 case 104: {
+                    if (caseSensitiveIdentifiers && !"stop".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.STOP, yytext());
                 }
                 case 282:
@@ -2191,6 +2225,9 @@ public final class ActionScriptLexer {
                 case 286:
                     break;
                 case 109: {
+                    if (caseSensitiveIdentifiers && !"play".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.PLAY, yytext());
                 }
                 case 287:
@@ -2252,6 +2289,9 @@ public final class ActionScriptLexer {
                 case 297:
                     break;
                 case 120: {
+                    if (caseSensitiveIdentifiers && !"trace".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.TRACE, yytext());
                 }
                 case 298:
@@ -2272,16 +2312,25 @@ public final class ActionScriptLexer {
                 case 301:
                     break;
                 case 124: {
+                    if (caseSensitiveIdentifiers && !"print".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.PRINT, yytext());
                 }
                 case 302:
                     break;
                 case 125: {
+                    if (caseSensitiveIdentifiers && !"mbchr".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.MBCHR, yytext());
                 }
                 case 303:
                     break;
                 case 126: {
+                    if (caseSensitiveIdentifiers && !"mbord".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.MBORD, yytext());
                 }
                 case 304:
@@ -2292,11 +2341,17 @@ public final class ActionScriptLexer {
                 case 305:
                     break;
                 case 128: {
+                    if (caseSensitiveIdentifiers && !"random".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.RANDOM, yytext());
                 }
                 case 306:
                     break;
                 case 129: {
+                    if (caseSensitiveIdentifiers && !"String".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.STRING_OP, yytext());
                 }
                 case 307:
@@ -2307,6 +2362,9 @@ public final class ActionScriptLexer {
                 case 308:
                     break;
                 case 131: {
+                    if (caseSensitiveIdentifiers && !"substr".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.SUBSTR, yytext());
                 }
                 case 309:
@@ -2317,6 +2375,9 @@ public final class ActionScriptLexer {
                 case 310:
                     break;
                 case 133: {
+                    if (caseSensitiveIdentifiers && !"Number".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.NUMBER_OP, yytext());
                 }
                 case 311:
@@ -2337,6 +2398,9 @@ public final class ActionScriptLexer {
                 case 314:
                     break;
                 case 137: {
+                    if (caseSensitiveIdentifiers && !"length".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.LENGTH, yytext());
                 }
                 case 315:
@@ -2347,6 +2411,9 @@ public final class ActionScriptLexer {
                 case 316:
                     break;
                 case 139: {
+                    if (caseSensitiveIdentifiers && !"getURL".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.GETURL, yytext());
                 }
                 case 317:
@@ -2357,6 +2424,9 @@ public final class ActionScriptLexer {
                 case 318:
                     break;
                 case 141: {
+                    if (caseSensitiveIdentifiers && !"newline".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALCONST, SymbolType.NEWLINE, yytext());
                 }
                 case 319:
@@ -2387,6 +2457,9 @@ public final class ActionScriptLexer {
                 case 324:
                     break;
                 case 147: {
+                    if (caseSensitiveIdentifiers && !"stopDrag".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.STOPDRAG, yytext());
                 }
                 case 325:
@@ -2397,26 +2470,41 @@ public final class ActionScriptLexer {
                 case 326:
                     break;
                 case 149: {
+                    if (caseSensitiveIdentifiers && !"printNum".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.PRINTNUM, yytext());
                 }
                 case 327:
                     break;
                 case 150: {
+                    if (caseSensitiveIdentifiers && !"mblength".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.MBLENGTH, yytext());
                 }
                 case 328:
                     break;
                 case 151: {
+                    if (caseSensitiveIdentifiers && !"getTimer".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.GETTIMER, yytext());
                 }
                 case 329:
                     break;
                 case 152: {
+                    if (caseSensitiveIdentifiers && !"startDrag".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.STARTDRAG, yytext());
                 }
                 case 330:
                     break;
                 case 153: {
+                    if (caseSensitiveIdentifiers && !"nextFrame".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.NEXTFRAME, yytext());
                 }
                 case 331:
@@ -2427,31 +2515,49 @@ public final class ActionScriptLexer {
                 case 332:
                     break;
                 case 155: {
+                    if (caseSensitiveIdentifiers && !"undefined".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALCONST, SymbolType.UNDEFINED, yytext());
                 }
                 case 333:
                     break;
                 case 156: {
+                    if (caseSensitiveIdentifiers && !"fscommand".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.FSCOMMAND, yytext());
                 }
                 case 334:
                     break;
                 case 157: {
+                    if (caseSensitiveIdentifiers && !"loadMovie".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.LOADMOVIE, yytext());
                 }
                 case 335:
                     break;
                 case 158: {
+                    if (caseSensitiveIdentifiers && !"prevFrame".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.PREVFRAME, yytext());
                 }
                 case 336:
                     break;
                 case 159: {
+                    if (caseSensitiveIdentifiers && !"tellTarget".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.TELLTARGET, yytext());
                 }
                 case 337:
                     break;
                 case 160: {
+                    if (caseSensitiveIdentifiers && !"targetPath".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.TARGETPATH, yytext());
                 }
                 case 338:
@@ -2467,81 +2573,129 @@ public final class ActionScriptLexer {
                 case 340:
                     break;
                 case 163: {
+                    if (caseSensitiveIdentifiers && !"getVersion".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.GETVERSION, yytext());
                 }
                 case 341:
                     break;
                 case 164: {
+                    if (caseSensitiveIdentifiers && !"unloadMovie".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.UNLOADMOVIE, yytext());
                 }
                 case 342:
                     break;
                 case 165: {
+                    if (caseSensitiveIdentifiers && !"mbsubstring".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.MBSUBSTRING, yytext());
                 }
                 case 343:
                     break;
                 case 166: {
+                    if (caseSensitiveIdentifiers && !"gotoAndStop".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.GOTOANDSTOP, yytext());
                 }
                 case 344:
                     break;
                 case 167: {
+                    if (caseSensitiveIdentifiers && !"gotoAndPlay".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.GOTOANDPLAY, yytext());
                 }
                 case 345:
                     break;
                 case 168: {
+                    if (caseSensitiveIdentifiers && !"loadMovieNum".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.LOADMOVIENUM, yytext());
                 }
                 case 346:
                     break;
                 case 169: {
+                    if (caseSensitiveIdentifiers && !"stopAllSounds".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.STOPALLSOUNDS, yytext());
                 }
                 case 347:
                     break;
                 case 170: {
+                    if (caseSensitiveIdentifiers && !"ifFrameLoaded".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.KEYWORD, SymbolType.IFFRAMELOADED, yytext());
                 }
                 case 348:
                     break;
                 case 171: {
+                    if (caseSensitiveIdentifiers && !"loadVariables".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.LOADVARIABLES, yytext());
                 }
                 case 349:
                     break;
                 case 172: {
+                    if (caseSensitiveIdentifiers && !"printAsBitmap".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.PRINTASBITMAP, yytext());
                 }
                 case 350:
                     break;
                 case 173: {
+                    if (caseSensitiveIdentifiers && !"unloadMovieNum".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.UNLOADMOVIENUM, yytext());
                 }
                 case 351:
                     break;
                 case 174: {
+                    if (caseSensitiveIdentifiers && !"removeMovieClip".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.REMOVEMOVIECLIP, yytext());
                 }
                 case 352:
                     break;
                 case 175: {
+                    if (caseSensitiveIdentifiers && !"loadVariablesNum".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.LOADVARIABLESNUM, yytext());
                 }
                 case 353:
                     break;
                 case 176: {
+                    if (caseSensitiveIdentifiers && !"printAsBitmapNum".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.PRINTASBITMAPNUM, yytext());
                 }
                 case 354:
                     break;
                 case 177: {
+                    if (caseSensitiveIdentifiers && !"toggleHighQuality".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.TOGGLEHIGHQUALITY, yytext());
                 }
                 case 355:
                     break;
                 case 178: {
+                    if (caseSensitiveIdentifiers && !"duplicateMovieClip".equals(yytext())) {
+                        return new ParsedSymbol(SymbolGroup.IDENTIFIER, SymbolType.IDENTIFIER, yytext());
+                    }
                     return new ParsedSymbol(SymbolGroup.GLOBALFUNC, SymbolType.DUPLICATEMOVIECLIP, yytext());
                 }
                 case 356:
diff --git a/src/com/jpexs/decompiler/flash/gui/action/ActionPanel.java b/src/com/jpexs/decompiler/flash/gui/action/ActionPanel.java
index efb255978..eee5b7f80 100644
--- a/src/com/jpexs/decompiler/flash/gui/action/ActionPanel.java
+++ b/src/com/jpexs/decompiler/flash/gui/action/ActionPanel.java
@@ -258,6 +258,11 @@ public class ActionPanel extends JPanel implements SearchListener<ScriptSearchRe
                 ident = tData.toString();
                 //We need to get unescaped identifier, so we use our Lexer
                 ActionScriptLexer lex = new ActionScriptLexer(new StringReader(ident));
+                if (src != null) {
+                    if (src.getSwf().version >= ActionScriptLexer.SWF_VERSION_CASE_SENSITIVE) {
+                        lex.setCaseSensitiveIdentifiers(true);
+                    }
+                }
                 try {
                     ParsedSymbol symb = lex.lex();
                     if (symb.type == SymbolType.IDENTIFIER) {