After giving up on Windows Vista last year, I figured I should give it another shot, given that it released today. Call me crazy, but I was hoping that maybe the released version was somehow different than the Microsoft internal bits I installed last year. Turns out, it is:
This time, it failed trying to upgrade my copy of Windows XP. After the first reboot, it stuck at "Gathering files 21%" for about twenty minutes, announced that it couldn't upgrade my computer, rebooted twice, uninstalled itself, and presented that error message.