Index: /FCKeditor/trunk/editor/_source/internals/fck.js
===================================================================
--- /FCKeditor/trunk/editor/_source/internals/fck.js	(revision 562)
+++ /FCKeditor/trunk/editor/_source/internals/fck.js	(revision 563)
@@ -824,5 +824,5 @@
 	{
 		// In source mode, some actions must have their default behavior.
-		if ( keystrokeValue.Equals( 'Paste', 'Undo', 'Redo', 'SelectAll' ) )
+		if ( keystrokeValue.Equals( 'Paste', 'Undo', 'Redo', 'SelectAll', 'Cut' ) )
 			return false ;
 	}