I got an error when upgrading my new iMac from Tiger to Leopard. (I get to the login screen, login, it goes to a blue screen, then back to login). After reading here I gather it's the same issue as the other blue screens where the 3rd party apps such as ShapeShifter cause Leopard to fail. Do you think they will do something about this or do we have to figure it out ourselves? I have no idea what to do now, but I'm definitely not reformatting and losing my programs/files. I feel sorry for those 1000s who are sitting with a busted computer right now.