I've just tried searching the forum and the bugzilla for this but can't find a thing. Have a bug where my system sounds (incomming sms & IM, close application, etc) stop working. The only sound I get is a muted beep and vibrate as normal. This is fixed by restarting. Can't seem to pin down which app is causing this if any. Has anyone else experienced this or have any ideas what is causing it?