title: iOS 3.X SIGABRT setting modalPresentationStyle, works fine on 4.2 iPod Touch
body: <p>Settings the presentation style on an iPod Touch 2G (3.1.3) crashes with SIGBART but works fine on an iPod Touch 4G (4.2).  Is this a bug? Can someone give me a workaround?</p>
  
  <pre><code>DateDialogController* dlg = [[DateDialogController alloc] initWithNibName:@"DateDialogView" bundle:nil];
  [dlg setDelegate:self];
  dlg.startDate = self.anchorDate;
  self.navigationController.modalPresentationStyle = UIModalPresentationCurrentContext;
  [self.navigationController presentModalViewController:dlg animated:YES];
  [dlg release];
  
  
  2011-08-02 13:44:20.785 Mobile Manager[274:207] *** -[UINavigationController setModalPresentationStyle:]: unrecognized selector sent to instance 0x230000
  2011-08-02 13:44:20.789 Mobile Manager[274:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[UINavigationController setModalPresentationStyle:]: unrecognized selector sent to instance 0x230000'
  2011-08-02 13:44:20.799 Mobile Manager[274:207] Stack: (
      864992541,
      859229716,
      864996349,
      864492313,
      864454720,
      346779,
      864749711,
      839231364,
      839231212,
      839231156,
      839230220,
      839233420,
      839227648,
      839225236,
      839206800,
      839205012,
      875886564,
      864740651,
      864738335,
      875880904,
      838872112,
      838865456,
      54257,
      54172
  )
  terminate called after throwing an instance of 'NSException'
  Program received signal:  “SIGABRT”.
  </code></pre>