Dual Ghz G4. Just upgraded to Panther and got all the software updates and now I'm frustrated. I conveniently forgot the phrase "if it ain't broke don't fix it!" My computer was working perfectly in Jaguar! I bought into the idea of expose (very cool), as well as the fax and font book (find them to be unsophisticated for my needs and therefore useless) Mail quits with html messages. Also, Sherlock & Safari quit as soon as I start using them and are totally useless. I guess I should downgrade, but that is just such a pain! Apple, fix it YO! I like expose a lot, this is an amazing feature! Also, I like the way that the finder windows are redesigned.