I had bricking issues with the previous Boot Camp (sorry I forget the version but it was the one before 1.2) and XP. Once I put in the BC drivers disc it'd install then endlessly cycle crashing on start-up, ruining the install I'd done. I had to give up in the end and just use Parallels. At one time it killed my Tiger install to the point where I couldn't boot a Firewire drive with a SuperDuper! clone on it unless I removed the internal HD! It was a mess.
Using 1.2 with Vista now and didn't have the same (or any) problems with the drivers.