title: UITableView scrolling odd behaviour
body: <p>I have a TableViewController in my app (well several but this only happens on this particular one).</p>
  
  <p>The content is driven from Core Data using an NSFetchedResultsController and the TVC is a NSFetchedResultsControllerDelegate and uses the methods for updating the table based on content changes (i.e. it runs the beginUpdates, endUpdates etc...).</p>
  
  <p>I've done this a number of times before and so just use the same code.  (Also can be found on Ray Wenderlich's site).</p>
  
  <p>Anyway, I have a view (pushed from the TVC) that adds new items in to the CoreData DB.  This new item should then be added into the TVC's table.</p>
  
  <p>This is all working fine.  I view the Table scroll up and down it fine. Click add. Add the new item.  Push back to the TableView and I can see the new item...</p>
  
  <p>BUT</p>
  
  <p>The tableView doesn't allow me to scroll all the way to the bottom now.  I can see the new data in the table by scrolling to the bottom and holding the screen but when I let go the tableView bounces back so that I can no longer see it.</p>
  
  <p>I have checked several things...</p>
  
  <ol>
  <li>The frame of the TableView is unchanged before and after.</li>
  <li>The contentSize of the tableView DOES change to accommodate the added cells.</li>
  <li>When scrolling the minimum contentOffset is 0 both before and after (this is correct).</li>
  <li>When scrolling the MAXIMUM contentOffset is the same both before and after (this is not correct).</li>
  </ol>
  
  <p>If I pop back to the rootVC and then push back to the TVC then I can scroll all the way again and see all my new cells.</p>
  
  <p>I did some testing.</p>
  
  <p>If I re-enable autoRotating using <code>- (BOOL)shouldAutorotate</code> then go through the motions of adding the new cells etc then I still can't scroll to the bottom.  But if I rotate landscape and then back to portrait then now I can scroll all the way to the bottom.</p>
  
  <p>Off the back of this I tried running the <code>[self viewWillLayoutSubViews];</code> method after the <code>[self.tableView endUpdates];</code> but still nothing.</p>
  
  <p>Like I said, I have done this before many times and with no problems.  I really don't understand what is happening now.</p>