title: didRotateFromInterfaceOrientation does not fire entering PortraitUpsideDown on iPad Simulator
body: <p>Our application starts in landscape mode ... in the plist Initial Interface Orientation is set to "Landscape (left home button)".</p>
  
  <p>When debugging with the iPad simulator, after the application starts, we rotate the simulated iPad using either the menu option Hardware > Rotate Left or using the keyboard command-LeftArrow.</p>
  
  <p>By placing a breakpoint in the View Controller at the entry point for didRotateFromInterfaceOrientation; we observe the breakpoint being hit when rotating into all positions except portrait-upside-down.</p>
  
  <p>This happens if we rotate to the right as well.  The breakpoint is hit when rotating into all positions except portrait-upside down.</p>
  
  <p>Is this a known issue, or is there something required to activate this capability?</p>
  
  <p>Thanks in advance.</p>