Get it while it's hot: http://www.apple.com/support/downloads/macpromid2006efifirmwareupdate10.html The big question is if this update fixes the VT-x issue with Parallels on the Mac Pro, which according to Parallels is an Apple firmware bug. I hope so!
The V-TX error wasn't fixed this time. I have installed both updates EFI and SMC... I still get the VT-X message and have to put the mac to sleep for getting speed... Regards Thomas