I've got a simple model viewer up and running and I'm noticing a bit of texture flicker on my linux nvidia geforce2. I'm guessing it's a driver problem, but I have the mose recent (or at least very recent) drivers and I wanted to make sure there wasn't some other problem. Oddly enough if I comment out glEnable(GL_DEPTH_TEST) the problem almost goes away. Some cracks still appear at the seams of some triangles, but the triangles themselves don't flicker black.