I'm also experiencing stuttering in Pandora Tomorrow. Not too much distracting, but it's there. I can recreate it in first level; when I approach or look up up the first ladder, or when I slide on the rope right next to it, there is always one stutter.
While we are at topic of stuttering, in december I played a game called Vietnam BlackOps from 2000, it runs on Lithtech engine and DirectX 7. Every time a bomb explodes I'm experiencing framerate drops. It can be easily recreated, the first area in first level a yard is being bombarded, and it's the most unstable area in the whole game when you are playing it with dgVoodoo. Without dgVoodoo the framerate is rock solid 60 FPS.
For the record, I've been using dgVoodoo 2.54, Windows 7 SP1, R9 270x GPU, it was the same with older Crimson ReLive and new Adrenaline drivers.