I love this game with every fiber of my being. Last few days, I've been lucky enough to be able to put in a lot of time into it. Some play sessions have been at least 8 hours. Well into 2 of those sessions, the music engine crashed, with the typical endlessly repeating audio buffer as the annoying symptom. The only way to fix that is to exit altogether and relaunch. Cant turn the music down either. It's well and truly frozen. Everything else continues to work without problems.
I have a Creative Audigy 2 card, and my system is very stable. I have no such problems with other games, old or new. This seems like an interrupt problem to me, something asynchronous which goes awry so rarely that it's difficult to catch and debug.