No problems that I've noticed yet. I had previously installed one of the beta versions on my computer at work and it was fine for the most part there too. However there was some reason that I uninstalled it before and I can't remember why that was right now. Anyway, I like the new look (I use small icons... I don't like the back button "key" when using the large icons) and features (especially additional information in address bar when typing) and it does appear to load faster than FF2.