title: iPad's status bar sometimes disappears, leaving a white space - but I never hide it!
body: <p>I'm never hiding the status bar but sometimes it just disappears.
  The pattern seems to be that it happens after some fullscreen transitions
  * Horizontal flip from one view to another
  * Use QLPreviewController and when it gets dismissed the status bar is gone.</p>
  
  <p>However, I can not reproduce it. It just happens sometimes. Never on the Simulator but only on the device.
  Rotating forth and back doesn't help either. If I leave my app, the status bar comes back in Springboard. Going back to my app, the status bar is still gone.</p>
  
  <p>Has anybody else seen this effect in a project?</p>