title: jQuery UI addClass(class, duration) not working
body: <p>I am sure I have had this working before, but under jQuery UI 1.7.2 and 1.8.7 it appears that <code>addClass(class, duration)</code> is no longer working. I cannot even get the demo to work either (in any browsers).</p>
  
  <p>I was using 1.7.2 up until a few minutes ago, when I upgraded. I swear I had it working  last night, yet this afternoon it wasn't working so thought it best to upgrade first, before posting here. However I have had no luck in getting it working.</p>
  
  <p>Is anyone else experiencing the same problem? Anyone had the same problem in the past and managed to solve it somehow?</p>
  
  <p>If it is working for other people then I will post my code here, but at the moment I don't feel the need to do so as it will just take up space.</p>
  
  <p>Thanks in advance.</p>
  
  <p>Regards,</p>
  
  <p>Richard</p>
  
  <p>Example removed - replaced with <a href="http://jsfiddle.net/Z6mJU/" rel="nofollow">http://jsfiddle.net/Z6mJU/</a>. It appears to be working here, so maybe I don't have jQuery set up correctly... I haven't fiddled with the masterpage much but apparently I have removed something vital, or so it seems. I will have another fiddle and see if I can solve it. Will post back here later with my progress.</p>