Stinkie, no problem.
For me the new Mac Pro works like a charm under Bootcamp vista 64. (Actually I never boot Fisher Price Macos X )
I didn't have any hickups yet and Indigo runs smoothly.
If you run XP64 or Vista64, Make sure to install the X64 version of Indigo. It is very stable and more speedy than the 32 bit in my opinion :better spreading of tasks over the different cores and better adressing of the RAM.
(And it does a great job on Crysis as well )