Hmmm. Just for the hell of it, try dropping your AGP back to 1X. You shouldn't realy notice any performance loss. I found that dropping my AGP one setting back from maximum does the trick. Actually, when I first had this problem, I was using AGP4X and had several lockups as well as this error. Later, I had a HD issue and had to reinstall my system. I had a friend of mine to it (more experienced and resourceful than me), but this friend forgot to install the AGP drivers. So, for the longest time, I was using an AGP video card in PCI mode, with horrendus framerates, but no texture anomalies or lockups. Its the only time that I've used OGL. Anyway, when I realized the problem, I installed the AGP drivers and got my performance back, but got the lockups, texture anomalies, and other instabilities with other games. I then reinstalled them in 1X mode (there didn't seem to be a 2X in the software) and the lockups went away, the texture anamalies (like you've been getting) went away, my stability returned, and I noticed no performance drop when compared to 4X. Since then, I've upgraded to a faster board and video card, but in AGP8X, I got the lockups I was mentioning, and general system instability. Dropping the AGP down to 4X solved these, with no performance loss.