Alright, reading a decent portion of the thread leads me to suspect a few things:
1) You all are running potentially buggy drivers for Direct3D, and you may all want to update your DirectX (won't walk through it here), as well as reporting this issue to DirectX (Tech crews of osu! may want to do the same, so a bit more advice can be pulled in). I base this on no crashes from OpenGL yet, and from the common link to graphics.
2) There's some stupid fancy setting (probably fps counter or something stupid) that keeps killing osu! somehow for you guys.
DISCLAIMER: I am nowhere close to osu! staff, these are my moderately-biased opinions/thoughts. Take it with a grain of salt, a hint of vinegar, and a splinter of wood. In all honesty, I am stabbing in the dark.