Has coreaudiod been fixed in Lion yet? I tried Lion a few months ago, but had to revert to 10.6 because of the "coreaudiod bug" – where audio via QuickTime would stop working every few minutes, requiring a killall coreaudiod each time. Since I'm a video editor, this would interfere with Final Cut and After Effects, making Lion unusable.

Does anyone know if this issue has been fixed yet in Lion?
Nope it hasn't. I'm still having problems in Logic because of it. I plug in a headphone cable, unplug it, and suddenly the computer doesn't have sound. Try killall /usr/sbin/coreaudiod then relaunch it, I get this:

[...] Error: FIXME: IOUnserialize has detected a string that is not valid UTF-8, "?-8?????-8????PDa????@Da????0??????Ԕ?????&lt;????????c".
Aug 14 01:56:48 Benjamins-MacBook-Pro.local coreaudiod[7392] Error: FIXME: IOUnserialize has detected a string that is not valid UTF-8, "?-8?????-8????PDa????@Da????0??????Ԕ?????????????c".
Aug 14 01:56:48 Benjamins-MacBook-Pro.local coreaudiod[7392] Error: FIXME: IOUnserialize has detected a string that is not valid UTF-8, "??c".
Aug 14 01:56:48 Benjamins-MacBook-Pro.local coreaudiod[7392] Error: FIXME: IOUnserialize has detected a string that is not valid UTF-8, "??c".
2012-08-14 01:56:48.994 coreaudiod[7392:707] Exiting due to uncaught exception in main


Apparently I've got some low level bug in my operating system or coreaudiod just wasn't compiled right.