Most of my applications crash whenever a sound is played -- but not if the machine has been recently rebooted.
For example, Mail.app crashes when I send email, because of the whoosh sending sound. Safari/Chrome/Firefox will crash when Flash plays sounds, e.g. with YouTube, but does not crash for silent Flash apps. iChat will crash if I get a video chat request. iTunes will not start at all.
All display the same symptom -- freeze with spinning beach ball. All can be force-quit without issue, and without affecting other applications.
If I start an app right after a reboot, it generally will run just fine. If I open Safari after a fresh reboot, I can watch Flash video for an hour or two without issue, but the next morning, it will crash again.
If I open Skype after a fresh reboot, it will remain open and working, sometimes for days. But if I close it, it will not open again until I reboot.
I've go through flashing PRAM and repair permissions with the Apple techs, and it doesn't seem to help. Any idea what I might be able to to do to get sound working again? I've been told to reinstall, but I primarily use the machine for work, and I can't take a week to get everything configured again just so I can use iTunes and YouTube.
What is particularly annoying is having to quit Mail.app and restart after each sent email. If there were a way to disable the sent email sound that would be great too.