Index: /CKEditor/trunk/_source/plugins/dialog/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/dialog/plugin.js	(revision 5494)
+++ /CKEditor/trunk/_source/plugins/dialog/plugin.js	(revision 5495)
@@ -384,9 +384,4 @@
 					dialogElement.on( 'keypress', focusKeyPressHandler, this );
 
-				if ( CKEDITOR.env.ie6Compat )
-				{
-					var coverDoc = coverElement.getChild( 0 ).getFrameDocument();
-					coverDoc.on( 'keydown', focusKeydownHandler, this, null, 0 );
-				}
 			} );
 		this.on( 'hide', function()
@@ -1587,5 +1582,5 @@
 			if ( CKEDITOR.env.ie6Compat )
 			{
-				var coverDoc = coverElement.getChild( 0 ).getFrameDocument();
+				var coverDoc = currentCover.getChild( 0 ).getFrameDocument();
 				coverDoc.removeListener( 'mousemove', mouseMoveHandler );
 				coverDoc.removeListener( 'mouseup', mouseUpHandler );
@@ -1605,5 +1600,5 @@
 				if ( CKEDITOR.env.ie6Compat )
 				{
-					var coverDoc = coverElement.getChild( 0 ).getFrameDocument();
+					var coverDoc = currentCover.getChild( 0 ).getFrameDocument();
 					coverDoc.on( 'mousemove', mouseMoveHandler );
 					coverDoc.on( 'mouseup', mouseUpHandler );