Good luck so far. I have had two issues but both Magically cleared up. I installed an upgrade version of Leopard and I had the most recent version of Parralels running... 5160 I think. On first run my Mac did it's Black screen of death. Not pretty. Second run, all was well. Actually, Spaces is awesome with Fullscreen mode. I am amazed it doesn't blow up switching. I have a desktop dedicated to XP and the rest is all OSX. Pretty awesome. After I was done screwing around I noticed that XP didn't have a network connection so I re-ran the Install Parralels drivers, and XP rebooted. Third Run, all seems well now with my network.