I have a copy of Leopard coming to me hopefully on Monday. As it is an Up-to-Date copy and I believe I have to "Upgrade," I am wondering how many people so far have UPGRADED to Leopard successfully without the blue screen issue? Many people have posted about their problems but it is difficult for me to see how wide-spread the issue is if people aren't talking about their successful upgrades. Your comments would be greatly appreciated! Thanks!!