--- Revision 498
+++ Revision 570
@@ -9,12 +9,16 @@
     if (this.shadow) { 
       this.shadow.hide();
       this.effect('show', this.shadow.shadow);
-    }    
+    }  
+    if (this.iframe)  
+      this.iframe.show();
   },
   
   hideShadow: function() {   
     if (this.shadow)
       this.effect('hide', this.shadow.shadow);
+    if (this.iframe)  
+      this.iframe.hide();
   },
   
   removeShadow: function() {
@@ -43,7 +47,8 @@
         .observe('blurred', this.blurShadow);
 
     if (this.options.shadow)  
-      this.shadow = new UI.Shadow(this.element, {theme: this.getShadowTheme()});
+      this.shadow = new UI.Shadow(this.element, {theme: this.getShadowTheme(), withIFrameShim: false});
+    this.iframe = Prototype.Browser.IE ? new UI.IframeShim() : null;
   },
 
   addElementsWithShadow: function() {
@@ -69,6 +74,10 @@
       var pos = this.getPosition();
       this.shadow.setPosition(pos.top, pos.left);  
     }
+    if (this.iframe) {
+      var pos = this.getPosition();
+      this.iframe.setPosition(pos.top, pos.left);  
+    }
     return this;
   },
 
@@ -78,6 +87,10 @@
       var size = this.getSize();
       this.shadow.setSize(size.width, size.height);
     }
+    if (this.iframe) {
+      var size = this.getSize();
+      this.iframe.setSize(size.width, size.height);  
+    }
     return this;
   },
 
@@ -85,5 +98,7 @@
     this.setBoundsWithoutShadow(bounds, innerSize);  
     if (this.shadow)
       this.shadow.setBounds(this.getBounds());
+    if (this.iframe)
+      this.iframe.setBounds(this.getBounds());
   }
 });
\ No newline at end of file