This isn't a bug exactly but if you have an AC 97 sound card (one of the types of onboard nforce sound cards) and have any issues like missing sounds or the game can't initialize the sound system, you probably just need new drivers.
To get the latest drivers:
for AC97 (normal): go here
for HD: go here
Depths of Peril, Kivi's Underworld, Din's Curse, Drox Operative, Zombasite, Din's Legacy, & Drox Operative 2