Latest round of Beta's do not work at all ... I have tried each Beta as it has been released, and I can say that not one of them has been able to boot my Windows XP VM. Each crash has been sent to the Parallels email, but to no avail. The best I get when booting is the XP Booting screen ... when it goes black (to resize the window to the XP Resolution), Parallels VM crashes ... The only way I can get it to work again is to uninstall, and revert back to the latest stable release. I am using a Mac Mini Core Duo, 2 GB RAM (allocating 512 to Parallels, with 384 to the VM). Looking forward to the next RC, as the latest ones just don't work.