Hi, Let me start out by saying that I do not personally own a Mac Pro (yet), since I'm holding out for the reboot after wake problem to get fixed by Apple. From this discussion, however, it seems that some people have found a workaround. The workaround is as follows: Ensure that no default disk is selected in the Startup Disk preference pane. One way to achieve this is to boot from e.g. a firewire disk containing an install of OS X and, when booted, select the firewire disk as the default startup disk. You can then shut down and remove the firewire disk. When you turn your computer back on and boot from your internal drive, there should be no default startup disk selected, since the firewire disk has now been removed. People have reported that the above fix works. One user even reports that he hasn't seen a reboot in a month after applying the workaround. So, Mac Pro Early 2008 owners, please test this and report back!