Im getting the same crash in OpenGL on Vista 64. After a few mins of playing, the screen freezes. BTW, my build is r1943 and i got it from a different site than your site. Bit of a bummer because its stopping me from testing Metal Gear Solid TS, crashes before i get to select new game!!!!There's nothing wrong with my computer, OpenGL works fine in in the x64 builds prior to 1921.
It's only x64 builds of 1921 and up that are exhibiting this issue, and it doesn't occur on the 32-bit builds.
It even crashes under XP x64 when trying to play a game. Under two different Operating system the x64 build crashes with the OpenGL plugin..