Hey guys, sometimes when I shut my iBook and then open it back up, all my OSX system sounds wont play. Such as the emptying the trash, getting new mail in apple mail, in iChat i can make it speak someones name but it wont play the regular sounds of getting a new IM or someone signing off and on. The only way i've found to fix this is to reset the computer. I've tried just switching users but that doesn't work. I've tried logging off of this user account and then logging back on but that doesn't work either. I've looked around is system settings but everything is turned on that I can find. I've also repaired permissions and that didn't work. Another weird thing, the poping noise when you change the volume will still play. So what do you guys think?