title: facebook send dialog callback not working
body: <p>I'm using the facebook send dialog, and want to redirect to a URL when the dialog closes.</p>
  
  <pre><code>FB.ui({
     method: 'send',
     link: 'http://***.com', 
     redirect_uri: '****', // publicly available URL
     description: '***',
     picture: '***',
     to: userId
     },
  );
  </code></pre>
  
  <p>The message sends and the iframe closes, but does not redirect. Can I uses FB.ui for this, or do I need to build in another callback function?</p>