I've found out recently that anytime the game sound dies, and you type snd_restart, my game crashes. I can type the command in any other time and it's fine, but if the sound actually goes out, the game just goes non-responsive and closes.
I run Windows Vista Home Premium 32 bit, but I'm not sure if this is just a vista bug, or a full blown b.21 bug, or even possibly just a bug with my DP.