2.5x and X crashes?

Ever since the release of the 2.5 series, and even now with 2.57 I have encountered an error.
I am not sure if it is blenders fault, or if it is my computers, but it goes like this:

  1. Working on blender
  2. Start Game engine
  3. Quit Game engine
  4. BBAANNGG (not really)
  5. Linux starts flickering, alternately black, and the bunch of text it says on log off for about 5 seconds
  6. A message appears, telling me that X (the display manager) has crashed.
  7. I try to restart X, but it crashes until I restart the computer…

Has anyone encountered this problem before?