I apologize for posting this as I know I have seen it come up on this board in the past. But I tried searching and came up short. I'm looking to buy a retail DVD of Tiger to put on my PowerBook and iBook and I need to know that the discs will work on a PPC machine. Am I correct in thinking that Tiger disks are universal? Because I thought that the first Intel machines shipped with Tiger, which had already been out for a while... I know the Leopard disks are universal but I just want to make sure I don't get burned.