I've been having some trouble lately to log in on site like Hotmail or Gmail with Firefox. In fact, everytime I have to log in somewhere where my login and password are not automatically remembered, Firefox shuts down unpon login and the OS offers to report the problem to Microsoft. After that, I can just reopen Firefox and it will work, until I try again to log in somewhere.
Firefox doesn't always do this, however, sometimes it works just fine.

Windows XP Pro SP2
Firefox 2.0.0.11
If you need other details I'll be glad to provide them.

Thanks!