title: NSInvalidArgumentException
body: <p>I'm getting a crash from this routine after adding the :(id)sender so I could determine which button called it. When set up as plain old toggleView3 it works perfectly. The crash occurs when detailView is toggled back to docView.</p>
  
  <p><code>'NSInvalidArgumentException', reason: '*** -[RootViewController toggleView3]: unrecognized selector sent to instance 0x524a00'
  2009-04-07 12:29:44.421 eTarot[11405:20b] Stack:</code></p>
  
  <pre><code>-(IBAction)toggleView3:(id)sender{
  
  
      if (detailViewController == nil) {
          [self loadDetailViewController];
      }
  
      UIView *docView = docViewController.view;
      UIView *detailView = detailViewController.view;
  
      [UIView beginAnimations:nil context:NULL];
      [UIView setAnimationDuration:1];
      [UIView setAnimationTransition:([docView superview] ? UIViewAnimationTransitionFlipFromRight : UIViewAnimationTransitionFlipFromLeft) forView:self.view cache:YES];
  
      if ([docView superview] != nil) {
          [detailViewController viewWillAppear:YES];
          [docViewController viewWillDisappear:YES];
          [docView removeFromSuperview];
  
          [self.view addSubview:detailView];
          [self.view insertSubview:detailNavigationBar aboveSubview:detailView];
          [docViewController viewDidDisappear:YES];
          [detailViewController viewDidAppear:YES];
  
      } else {
          [docViewController viewWillAppear:YES];
          [detailViewController viewWillDisappear:YES];
          [detailView removeFromSuperview];
          [detailNavigationBar removeFromSuperview];
          [self.view addSubview:docView];
          [detailViewController viewDidDisappear:YES];
          [docViewController viewDidAppear:YES];
      }
      [UIView commitAnimations];
  }
  </code></pre>