I never thought I'd say this, but I'm having problems with Firefox!
Sometimes while I'm browsing the web (regular web pages, not necesserily heavy Flash and graphics stuff), it starts to really slow down and eventually unusable. I go to task manager, and see that Firefox is running at 99% CPU. I try to wait a minute or so hoping that it'll go back down, but it never does. I'm forced to end the task and start Firefox again. WTF?
Also, I really like to use the autocomplete feature. Instead of using bookmarks or typing the url, I just type the first letter or 2 of a URL and then scroll down the dropbox to the one I want. Recently I've noticed that it often takes a few seconds delay to show the drop box of available URLS. And it's not because there are a lot of them.
Anyone else have similar problems?