title: What is the problem with groupTableViewBackgroundColor on iPad?
body: <p>My background color is white! Why?
  Just start an new View-based app for iPad and set background color in viewDidLoad.</p>
  
  <pre><code>  - (void)viewDidLoad {
      [super viewDidLoad];
      self.view.backgroundColor = [UIColor groupTableViewBackgroundColor];
  }
  </code></pre>
  
  <p>What is wrong. If I set it to redColor it works. Why?</p>