>I can't take credit for this one... I ran into the same problem but here's where I got the answer:
>http://www.actionscript.org/forums/showthread.php3?s=&threadid=22100
>
>here's the code we used:
>getURL("javascript:window.opener=self; window.close()");

This is a hack that I would steer clear of. JavaScript is not intended to be able to close a window it did not open. Though it works with some versions of IE now, the bug may be fixed in future updates. This does not work with all browsers such as Firefox and others based on the latest Mozilla release.