I too have seen some slowness in the Pose window - but even worse, by a long way, is the length of time my PC takes to do anything in the Materials room.

I have P7 with SR3
Quad Core, ATI 4870, 4 Gig of RAM, Vista Ultimate 64 bit.

It's getting to the stage where making any changes in the materials room is just not worth it - shame, as with the new VSS, Poser was starting to create some really cool pics.