Although I'm late to the party in reviewing Windows Vista SP1, it's becoming widely available as I write this, so now is as good a time as any for my review. Rather than try to cover every improvement in SP1, I'm going to cover my particular experiences. Read my review.
I've been holding off on using Firefox 3 as my everyday browser because I really like several extensions that won't install on FF3. I went looking for and eventually a workaround for installing these extensions and then wrote an article about it. I've been using FF3 all morning and so far it's worked flawlessly. I haven't seen any stability problems and it seems to work fine with Joomla's Javascript heavy back-end. Firefox 3 is as fast or faster than Firefox 2 and is a little less memory hungry, as I wrote in another article on Firefox 3 Beta 4. I'll report back here on any problems I have, especially if I'm forced back to Firefox 2 for any reason. So far, so good.