I get some strange transparency issues with P7 and the 93.71 series.

Such as transmaped materials disappearing when i change their properties then reappearing when I change another material area, then disappearing again when i change yet another.

Then there are issues with V4's eyes and their various transparent materials.

Sometime these issues are fixed when I enable the "Enhance Multilayer Transparency" option, only to create different problems or they're fixed with the enhancement OFF, etc.

Switching to Sreed preview pretty much fixes everything, but it's very slow, as usual, but I didn't spend ~$450 on a video card for nothing!

All the issues seem to revolve around transparencies. The shader preview and high resolution texture preview work great, at least as far as my experience goes.