Index: /CKEditor/trunk/_source/plugins/wysiwygarea/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/wysiwygarea/plugin.js	(revision 5045)
+++ /CKEditor/trunk/_source/plugins/wysiwygarea/plugin.js	(revision 5046)
@@ -780,15 +780,13 @@
 	if( CKEDITOR.env.gecko )
 	{
-		var topWin = window.top;
-
 		( function ()
 		{
-			var topBody = topWin.document.body;
-
-			if( !topBody )
-				topWin.addEventListener( 'load', arguments.callee, false );
+			var body = document.body;
+
+			if( !body )
+				window.addEventListener( 'load', arguments.callee, false );
 			else
 			{
-				topBody.setAttribute( 'onpageshow', topBody.getAttribute( 'onpageshow' )
+				body.setAttribute( 'onpageshow', body.getAttribute( 'onpageshow' )
 						+ ';event.persisted && CKEDITOR.tools.callFunction(' +
 						CKEDITOR.tools.addFunction( function()