title: Setting Corner Radius on UIImageView not working
body: <p>I'm at a bit of a loss. I've used the layer property of UIView to round the corners of multiple elements in my app. However, this one UIImageView is simply not complying. Not sure what I am missing.</p>
  
  <p>The UIImageView (called previewImage) is contained in a Table View Cell. I've tried setting the cornerRadius property multiple location (in the cell itself and in the controller that creates the cell) to no avail.</p>
  
  <pre><code>static NSString *CellIdentifier = @"MyTableViewCell";
  
  MyTableViewCell *cell = (MyTableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
  if (cell == nil) {
      NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:CellIdentifier owner:self options:nil];
      cell = [topLevelObjects objectAtIndex:0];
      cell.previewImage.layer.cornerRadius = 20; //Made it 20 to make sure it's obvious.
  }
  </code></pre>
  
  <p>Is there something about the way cells are loaded that I'm missing?</p>