I just bought (1 month ago or so) a new core i7 15" MacBook Pro. It has the latest update to 10.6.4. And I am seething with anger. I never thought I'd say this, but by almost every respect, Windows 7 is more reliable and stable than Snow Leopard. Snow Leopard is pure garbage, in terms of those two criteria. My issue, among many is that I have noticed, several times, that I click on an app in the dock, or in the Applications folder, and they bounce in the dock for a few seconds, and then NOTHING. Thing is, these are all OS X apps: Safari, Mail, iWeb, Console, iTunes. Maddeningly, third party apps will work. I have to restart in order to use Mail or Safari. This is pathetic. I am ranting here a bit, but really, I am here to see if anyone else has this issue, and if there is a solution. Thanks.