open control.window dynamically only works with Fade = true

Hello. I'm trying to move from the old Control.Model to the new Control.Window and i'm having troubles with simple windows that I want to open dinamically.

The following example only works when "fade: true" is on the options:

<a href="#" onClick="openMyWindow('http://www.google.com');">Click to
open Google in an Iframe</a>
<a href="#" id="dummyA" />
<script>
 function openMyWindow(url) {
       $('dummyA').href = url;
       var myWindow = new Control.Window($('dummyA'),{
           className: 'simple_window',
           closeOnClick: true,
           fade: true,  // ths is the line, but I don't want to fade!
           iframe: true
       });
       myWindow.open();
 }
</script>

Also, once opened with fade, it takes several clicks to close it. This did not happen before with Control.Modal.

How can I solve it? Thanks!

Jose.