title: Default.png is shown misplaced
body: <p>After updating iPhone to iOS 5.1 and Xcode to 4.3.1, I rebuilt the app to test compatibility.
  Except <code>UIKeyboardWillChangeFrameNotification</code> is removed, every thing goes well. <br /></p>
  
  <p>But a strange issue occurred, the launching screen had a while line under the "Default.png". Has anyone met the same issue before? Thanks for any tips.</p>