title: UITableView numberOfRowsInSection called multiple times
body: <p>How many times should the <code>tableView:numberOfRowsInSection</code> method be called when populating a table view?</p>
  
  <p>My application is crashing with no warnings, errors, or a stack trace. I have also tested for memory leaks and have found none. The app holds steady at about 1.4MB.</p>
  
  <p>I have NSLog reporting as methods are messaged, and I notice that <code>tableView:numberOfRowsInSection</code> is being called multiple times. The app crashes during one of these "extra" calls. The point at which the app crashes varies. I should point out that the table is populating about 600 cells, if that makes a difference.</p>
  
  <p>I can post code if you want, but my data source comes from a <code>singleton class</code>, so It is a lot of code. Any help would be greatly appreciated. </p>