My son's new Mac Book Pro (15.4") was playing the sounds from his games (Second life and Lugaru).
Last night I did a mega install of Adobe CS2 suite, MS Office X, Audacity, FX Effects Lab, etc and then ran the /sbin/fsck disk repair (none needed) and then ran Cocktail (crons, repair permissions, delete caches).
All the "real software" is working fine with sound.
The games work, but no sound.
Since he's leaving for school tomorrow I'm short on time.
PS. a re-install of Lugaru didn't change it.
Thanks