I searched around but couldn't find anything regarding this... I've built a ROM from the ppckitchen v3.02 w/GPS and I'm regularly having a problem with the audio stopping to "play" at all. This is any type of non-phone audio - ie: rings, alerts, etc.
It's become quite a hassle, I've set my phone to vibrate with all rings and alerts for now to reduce the missed calls.
Has anyone seen the same thing? A soft reboot fixes it temporarily. The audio will just die on normal operation. I can't pin it down to a specific program.