A lot of problems Studio has is with video cards/drivers..  it might be a simple as grabbing a new or alternate driver.  Though I've not tried to run it on anything other than xp and vista 32 and vista 64 so I dunno...  and one version might work fine and the next not work at all, I went from 1.8 straight to 2.2 and skipped everything in between 'cause it was so unstable for me.  Poser definately is better on stability and consistancy.

Here's how the shoes are coming along..  little bit of modeling work yet to do, I'll probably leave the upper plain like that so it can be transmapped into a bunch of different styles...