No trouble at all, I'd love to be able to help you get it working! It seems GLSL compilation isn't working, and my first thought is to wonder whether it's the driver: I've only tested with Mesa on ATI cards, so if there is an NVIDIA compatibility issue, I won't have caught it yet. If it's not a huge hassle, you could try swapping to Mesa and seeing if that helps. I'll also tinker around and let you know if I find anything.