Index: /FCKeditor/trunk/editor/_source/commandclasses/fckjustifycommands.js
===================================================================
--- /FCKeditor/trunk/editor/_source/commandclasses/fckjustifycommands.js	(revision 831)
+++ /FCKeditor/trunk/editor/_source/commandclasses/fckjustifycommands.js	(revision 832)
@@ -72,5 +72,5 @@
 
 	if ( names.length > 0 )
-		regex = new RegExp( '(?:^|\s+)(?:' + names.join( '|' ) + ')(?=$|\s)' ) ;
+		regex = new RegExp( '(?:^|\\s+)(?:' + names.join( '|' ) + ')(?=$|\\s)' ) ;
 	else
 		regex = null ;