getURL problems with Firefox and Safari

I am using getURL to do GET and POST to a named window. The window is the
parent window of the popup window which contains the swf.

I have verified that the window is named what I think it is, (I'm using
javascript window.name="myname" in the main window) and I use the window name
in the getURL.

This correctly applies the GET and POSTs to the named window when I use IE or
Opera, but Firefox and Safari spawn new windows every time, instead.

Is this a known problem, and is there any work-around?

Suggestions would be very much appreciated!

Thanks!

Okay, I figured it out.

It was a security problem. If the popup and the main window are not in the
same domain (which was the case here), Firefox and Safari won't let the child
window target the parent. Instead, it spawns a new window. I'm not sure why
this would be considered better in terms of security, but that's what it does.

The solution was to make the popup have the same domain as the parent.