That's great This is the only thing that causing a problem, and we have a bunch of mac users in our organization who will of course refuse to use something like Mozilla when almighty Apple has created the best browser ever to grace the planet....
i just bought the menus and ran straight into this problem on the very first project, after a while messing around with z-index and divs i ended up checking the forum and finding this thread
I'm not up on Iframes, never use them, but isn't there a script that can be added to bring the menu above flash or forms or something, and would that help in this case?
Just thought it might be worth looking into, I have no idea.