Here's some screenshots of sites that are weird looking now:
GameSpot.com: http://i7.photobucket.com/albums/y271/Ze...
Facebook.com: http://i7.photobucket.com/albums/y271/Ze...
Answers: They are both displaying fine for me in Firefox 3. Maybe you should try clearing your cache.
Click Tools -> Clear Private Data
Make sure "Cache" is checked and uncheck anything else you don't want cleared (like form data)
Click "Clear Private Data Now"
For some reason it looks like it's not applying the style sheets which is why I think that clearing the cache might help.
facebook has been hit with the "Jester virus",which means you need to clean up.try re posting a request on how to get rid of Jester virus