I've used FF forever and never had any problems with it until recently, but the only problem seems to be with MY website... Dropdown menus won't work. You click the option you want and it just sits there and does absolutely nothing both in the backend area and the actualy website. I just upgraded to 2.0 last night and it worked for about a minute, and all my editor options are gone (like the ones when making a post...Bold, Italic, Font style, etc...)
It's driving me insane. I hate using IE and am forced to use it now. =[
I don't know if it's FF or my computer or what is going on, but it is frustrating!