title: Animation of Back-Button broken after dismiss of Modal View Controller
body: <p>I'm having a very very strange issue here. I have an App with a Tabbar Controller and 4 Tabs, each of them has a Navigation Controller hooked up to a Viewcontroller. Everything worked as it should, but now I have added a button to a couple of Views, which invokes a Modal View Controller to slide up and show some content. Within this Modal VC there's another button to hide the Modal View. 
  After the Modal View gets hidden, if I tap the back-button in my navigation bar, the view doesn't animate back but just shows the previous view instantly without animation, while the navigation bar is indeed animated. But when I use the tab bar to switch to another View and immediately switch back, it suddenly starts working again. </p>
  
  <p>I'm using iOS SDK 6 without Storyboards, since I have developed this app back on iOS 3.2 a few years ago</p>
  
  <p>This is how I'm showing the Modal VC:</p>
  
  <pre><code>-(void)reportIssue{
      ReportIssueViewController *rivc = [[ReportIssueViewController alloc] initWithNibName:@"ReportIssueViewController" bundle:[NSBundle mainBundle]];
      [self.navigationController presentModalViewController:rivc animated:TRUE];
      [rivc release];
  }
  </code></pre>
  
  <p>And this is how I'm hiding it:</p>
  
  <pre><code>- (IBAction)cancelIssue:(id)sender {
      [self dismissViewControllerAnimated:TRUE completion:NULL];
  }
  </code></pre>
  
  <p>Has anyone ever had such a strange issue like this??? 
  I would be happy about any ideas on how to get rid of this behaviour. </p>
  
  <p>Thanks in advance.</p>