User interface sound effects stop working randomly in Mountain Lion
Sounds like putting a file in the Trash, emptying the Trash, a file finishing copying, etc...randomly stop working. In System Preferences -> Sound, the "Play user interface sound effects" box is checked. All other sounds [watching a video, playing music through iTunes, etc...] work just fine, so it's not a hardware issue. Restarting the computer seems to fix the issue, but then the system sounds will stop playing at some random point.
Anyone have a solution or are experiencing this problem also?
iMac, OS X Mountain Lion (10.8.1)