title: objective-c writeToFile Doesn't on iPad, Does on simulator
body: <p>I've seen the explanation that writeToFile doesn't work with non-objects,
  however, this snippet shows there is a serious gap in what works on the iPad device
  and how the simulator works.</p>
  
  <pre><code>NSMutableArray *arrayOne = [NSMutableArray arrayWithObjects:@"Thing One", @"Thing Two", @"Thing Three", nil];
  [arrayOne writeToFile:@"myLocalMovieMetaData-v11" atomically:YES];
  NSLog(@"cancelNowButton Test Metadata File Written.");  
  NSMutableArray *arrayTwo = [NSMutableArray arrayWithContentsOfFile:@"myLocalMovieMetaData-v11"];
  NSLog(@"arrayOne: %@",arrayOne);
  NSLog(@"arrayTwo: %@",arrayTwo);  //this prints on simulator but not the device.
  </code></pre>