Index: /FCKeditor/trunk/editor/_source/classes/fckstyle.js
===================================================================
--- /FCKeditor/trunk/editor/_source/classes/fckstyle.js	(revision 793)
+++ /FCKeditor/trunk/editor/_source/classes/fckstyle.js	(revision 794)
@@ -272,4 +272,7 @@
 	CheckElementRemovable : function( element, fullMatch )
 	{
+		if ( !element )
+			return false ;
+
 		var elementName = element.nodeName.toLowerCase() ;