So, now that this version has come out, there have been a few things that have annoyed me. It is still a great and very responsive browser, but since IE 7 came out, it is tempting to d/l it and run it exclusively. There are still some webpages though that do not work with IE 7 and Firefox which is still a little dosconcerning (i.e. Focus Air HR Webpage).
Lifehacker posted a nice little list of configuration tweaks that I must give a shout out to because of how useful they have been. Check it out at: http://www.lifehacker.com/software/firefox-2/geek-to-live-top-firefox-2-config-tweaks-209941.php