title: Shadowbox not working in Firefox
body: <p>I have a strange problem.
  I have integrated shadowbox plugin into my drupal web and it works with Opera, Chrome and IE9, but it doesn't work with Firefox 14.</p>
  
  <p>I've noticed that in Firefox <code>rel="shadowbox"</code> attribute is not added to the link of an image, so that should be the reason.</p>
  
  <p>How could I solve this?</p>