I'm still using 10.6.8. The User Interface sounds, emptying trash etc, are gone. If I reboot they sounds come back for maybe a few hours to a day and then are gone again. So far I have deleted sound plist files and reset PRAM but no luck in fixing this issue.
Any ideas for permanent fix to the missing UI sounds?
This is something of a known issue, I have also been affected by it. Unless there's been a new development recently, nobody knows exactly what cause it or a reliable way to prevent it.
I work for the Department of Redundancy Department