title: Navigation controller and ViewDeck library
body: <p>I have a problem with the view deck library and the navigation controller, the app crashes when I press the back button with a popviewcontroller.
  Is there someone who has added the view deck with a navigation controller present in their app?</p>
  
  <p>I've inizializes the deckView in this way:</p>
  
  <pre><code>LeftViewController *leftViewController = [[LeftViewController alloc]initWithNibName:@"LeftViewController" bundle:[NSBundle mainBundle]];
  
  
  CentraController *centralViewController = [[CentraController alloc]initWithNibName:@"CentraController" bundle:[NSBundle mainBundle]];
  
  
  self.deckController = [[IIViewDeckController alloc]initWithCenterViewController:centralViewController leftViewController:leftViewController];
  
  self.deckController.leftLedge = 100;
  self.deckController.navigationControllerBehavior = IIViewDeckNavigationControllerContained;
  
  [self.navigationController initWithRootViewController:deckController];
  [window setRootViewController:self.navigationController];
  </code></pre>