title: UINavigationBar .items accessor doesn't return the current UINavigationItem
body: <p>In my <code>UINavigationBar: didPopItem:</code> function the navigation bar's <code>_itemStack</code> has n items in it, shown in the debugger, but the <code>.items</code> accessor function returns an array with n-1 items in it, missing the current navigation item, which is what I want to check. <code>backItem</code> returns the n-2 item instead of the n-1, etc. The <code>didPopItem</code> item is the 'n+1' item so that doesn't help either.</p>
  
  <p>How do I access the current UINavigationItem?</p>
  
  <p>I'm using the iPhone 3.0 SDK.</p>