title: UILocalNotification doesn't play a specific sound
body: <p>I can't get the iPhone to play a 2 seconds long mp3 sound on notifications. I've tried with a 7 seconds long mp3 file and that works well. As far as I know there shouldn't be any restrictions on the minimum length of a notification sound.</p>
  
  <p>The mp3 sounds are added to the project in the same way, so that shouldn't be the problem.</p>
  
  <p>Is there any restrictions on mp3 files for UILocalNotification, which I should know about?</p>