Well I'm so BSODed I can't play or test the game.
My machine has an nVidia 260, modern drivers, 64bit Vista, 4 gigs ram, loads of free hard drive space.
Why are you still messing with the graphics code for a miniexpansion? The graphics are fine, the gameplay should be the only concern, rather than drag the beta out for a long time, just fix the balance issues (ie mostly mines)
There's NOTHING else on my machine that will BSOD it, so that's quite an achievement. Individual programs occasionally fail, but they close down and leave the OS functioning fine. I hadn't BSODed since I upgraded from Windows 2000, several years back, so that was a bit of a shock.
*sigh* Do you want windows error files (ie *dmp, sysdata,version files?
Edit: The crash happens after I enter the game engine (ie after I start a game, not the program itself) it typically happens before a minute of play, and after I zoom out to see the local neighborhood.