I'll bump this as well. I lost my sms notification sound/vibe! A message will tell me I have 1 unread but thats it.
Me I had the problem that all my sound was on but still if someone calls or sms I didn't hear nothing. after looking it was the profile that was on silence (push the power button for 3 sec and after choose profile). Hope this can help for you. After to change it to default all works perfect.