[Dr. Sivana]

firefox crashes and hangs a lot I find on Windows7.

I have the same issue. The cut and copy menu items are often grayed out randomly.

[Mr Fuji]

Not that this post is really that helpful but I’m running Windows 7 on three boxes with FF 3.5 and haven’t experienced the issues you are having. My brother is running it on 3 machines as well and hasn’t reported crashing and hangups and he’s the type that would complain to me about it. We are all running Windows 7 Ultimate but I wouldn’t think the flavor of 7 would make the difference.