I've been a FF user for sometime, and NS before that, only using IE when I absolutely have to. But I upgraded to IE7 and haven't had a single glitch. In fact, the upgrade brings quite an improvement to the IE family, so much so that I'm a bit disappointed in the FF2 upgrade. Of course, it's easier to make large improvements when you're absolutely terrible, and IE still is my second choice, but it's tolerable now.