title: Pixelated text in UILabel within UIScrollView, both with transparent background
body: <p>I have a weird issue:</p>
  
  <p>I have a UIScrollView whose background is transparent. Inside of it there are a few UILabels also with a transparent background and with a custom font.</p>
  
  <p>When the scrollview is first displayed everything looks sharp and good but as soon as I start panning the scroll view, the text of the labels gets extremely pixelated.</p>
  
  <p>This does not happen if i set an opaque background to the labels.</p>
  
  <p>Do you have any idea what might be causing this?</p>