Index: /FCKeditor/trunk/editor/_source/internals/fcktoolbarset.js
===================================================================
--- /FCKeditor/trunk/editor/_source/internals/fcktoolbarset.js	(revision 257)
+++ /FCKeditor/trunk/editor/_source/internals/fcktoolbarset.js	(revision 258)
@@ -71,4 +71,5 @@
 			// Create the IFRAME that will hold the toolbar inside the target element.
 			var eToolbarIFrame = FCKTools.GetElementDocument( eToolbarTarget ).createElement( 'iframe' ) ;
+			eToolbarIFrame.src = 'javascript:void(0)' ;
 			eToolbarIFrame.frameBorder = 0 ;
 			eToolbarIFrame.width = '100%' ;