--- Revision 570
+++ Revision 572
@@ -48,7 +48,7 @@
 
     if (this.options.shadow)  
       this.shadow = new UI.Shadow(this.element, {theme: this.getShadowTheme(), withIFrameShim: false});
-    this.iframe = Prototype.Browser.IE ? new UI.IframeShim() : null;
+    this.iframe = Prototype.Browser.IE || true ? new UI.IframeShim({parent: this.windowManager.container}) : null;
   },
 
   addElementsWithShadow: function() {