IE Crashing on tab key

Hey All

I have a Flex application that loades external swf’s, some of these swf’s have Textfields in them.

The problem is that when the user hits the tab key, the brower freezes, this only happens in IE and happens on every computer tested on.

This is driving me crazy, the fields have no code related to them, this just seems to be a problem with flex and ie.

By the way, if I open up the swfs in a brower on thier own, there is no problem.

Any suggestions?