I don't know what's the deal with it. While everyone around is bitching about shit like Download Day or argues about who loves firefox 3 more. I'm not sure if these people are blindfolded or something. Firefox 3 isn't any better than Firefox 2.x. Which means, it still sucks. Same people are also hating on IE for no bigger reason. Let's compare these two browsers then.
First of all, FF's look is terrible. You can't dent it, it's awful in every way. IE comes with nice skin itself, you don't have to waste time searching for any. If you do - you have thousands of skins to choose from, while there are only couple of skins for FF3 right now.
Second, memory usage. This isn't the times when every opened link created a popup of another process of IE, now IE got tabs, same as FF. Unless you actually keep 40+ tabs open, it's IE which needs less memory. FF3 is also a step forwards since the era of 2.x, but it's still not as good as IE.
Third, speed of loading pages. FF3 really isn't any better than IE. It's some silly myth that IE SUXXOR FF FOR THE WIN LOLZ. Those two browsers are definitely compareable at this point.
Lastly, security. It was the thing that was supposed to get so much better with the release of FF3. And what ? FF3 doesn't let you enter on phishing sities. So fucking what. If someone's retarded enough to give his/her passwords to a crappy phising sites, they deserve to lose them. Other than that, there's few way to get infected. Lame excuse for creating such aura of stepping into new era.
FF3 sucks and so does FF3 fanboys.