I have FF w/....... Plus so I don't see any ad on FT, but there's always something in the ad....

Not sure if it's related but your problem reminded me of some flash player issues with ads on FT a while ago:

http://www.flyertalk.com/forum/techn...-computer.html

http://www.flyertalk.com/forum/techn...ie7-crash.html

What you run into may not be flash-related, but it wouldn't hurt to make sure all your drivers are current and/or updated.