Index: /FCKeditor/trunk/editor/_source/internals/fcktools.js
===================================================================
--- /FCKeditor/trunk/editor/_source/internals/fcktools.js	(revision 1106)
+++ /FCKeditor/trunk/editor/_source/internals/fcktools.js	(revision 1107)
@@ -426,5 +426,5 @@
 	var prevNode = null ;
 	var curWindow = FCKTools.GetElementWindow( curNode ) ;
-	while ( curNode && !( curWindow == w && curNode == w.document.body ) )
+	while ( curNode && !( curWindow == w && ( curNode == w.document.body || curNode == w.document.documentElement ) ) )
 	{
 		x += curNode.offsetLeft - curNode.scrollLeft ;