I have an old PPC Mini and an iBook G4 which have always played well together. I'll be buying an Intel Mini soon, and I have a couple questions: 1. Are there any conflicts in networking or sharing data between an Intel Mac and a PPC Mac? 2. If my new computer has Leopard on it, and Rev.A Leopard turns out to be all buggy or something, will I be unable to install my existing copy of Tiger instead? (I think it's 10.4.5 or something around there.) Thanks. Apologies in advance if these are dumb questions.