I have Poser Pro and am running it on XP Pro 64 bit with a quad core Core 2 and 8 GB RAM. A very large problem scene (from someone else) that I was able to render almost half of in Poser 7 (half was quite a bit more than anyone else could!) in Poser Pro rendered 95% (the second half of the last row of tiles didn't work.) I was rendering in the background while I was testing network rendering and also setting up other scenes. When I have time I'll retry the render in the foreground. I suspect that the failure was a bug, the rest of the render went smoothly.

It also seems more responsive in the user interface, enough that Poser Pro is my new posing app. P7 has these hangs for no apparent reason. I just wish they named Poser Pro something else, I am already confusing it with Poser Pro Pack!