Index: /FCKeditor/trunk/editor/_source/internals/fcktools_ie.js
===================================================================
--- /FCKeditor/trunk/editor/_source/internals/fcktools_ie.js	(revision 721)
+++ /FCKeditor/trunk/editor/_source/internals/fcktools_ie.js	(revision 722)
@@ -173,5 +173,5 @@
 		oSizeSource = oDoc ;
 	else
-		oSizeSource = top.document.body ;		// Other IEs
+		oSizeSource = win.document.body ;		// Other IEs
 
 	if ( oSizeSource )