title: Create Custom UIButton - Image Quality Issue
body: <p>I have a strange problem with my buttons in a tableView.</p>
  
  <p>I want to create them via code - as there may be one or 7.</p>
  
  <p>When I create </p>
  
  <pre><code>UIButton *testButton = [UIButton buttonWithType:UIButtonTypeCustom];
  testButton.frame = CGRectMake(xPos, 110, 28, 28);
  testButton.adjustsImageWhenHighlighted = NO;
  </code></pre>
  
  <p>It works, add the button perfectly. But when I scroll up and down a few times the image looses quality. (My image is a circle, transparent border - no resizing necessary it fits the frame).</p>
  
  <p>If i add the same button using interface builder, scroll up and down, it remains perfect, the the other buttons have lost quality, only around the outside, when the pixels border the transparent area.</p>
  
  <p>Am i missing something when i create the button using code? </p>