title: UITextField text disappears on every other keystroke
body: <p>Here is a video of the phenomena:
  <a href="http://youtu.be/c0TP8YVF9TE">http://youtu.be/c0TP8YVF9TE</a></p>
  
  <p>As the video shows, the value in exampleTextView.text is not lost. Its just hidden every other keystroke. </p>
  
  <p>Solutions tried: 
  I do not set the exampleTextView.text value to something during the program, except after the return key is pressed (and commenting that line out changes nothing).</p>
  
  <p>I have set:</p>
  
  <pre><code>self.exampleTextView.clearsOnBeginEditing=NO;
  self.exampleTextView.clearsContextBeforeDrawing=NO;
  self.exampleTextView.clearsOnInsertion=NO;
  </code></pre>
  
  <p>Edit:
  Here is my code:
  <a href="https://gist.github.com/andrewschreiber/6970283">https://gist.github.com/andrewschreiber/6970283</a></p>