title: Implicit conversion from enumeration type 'UIBarButtonSystemItem' to different enumeration type 'UIBarButtonItemStyle' - iPad - iOS5
body: <p>I am getting the warning in the subject line above when running my app under xCode 4.3.</p>
  
  <p>Here is the offending code :</p>
  
  <pre><code>UINavigationController *navigationController = [[UINavigationController alloc]   initWithRootViewController:map];
  
      UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithTitle:@"Done"
                                                                      style:UIBarButtonSystemItemDone target:self action:@selector(removeCurrent)];
      map.navigationItem.rightBarButtonItem = rightButton;
  
      [self presentModalViewController:navigationController animated:YES];
  </code></pre>
  
  <p>Can anyone help ?</p>
  
  <p>Thank you !</p>