title: jQuery UI Sortable and :active mouse cursor for handle
body: <p>I'm trying to use Sortable to reorder the items of a list.  I've got a handle for each item of the list, which has <code>:hover</code> and <code>:active</code> css cursor settings, so that the cursor changes when the user mouses over the handles (and again when dragging).</p>
  
  <pre><code>&lt;html&gt;
    &lt;head&gt;
      &lt;style&gt;
        span { width: 20px; background: red }
        span:hover { cursor: -moz-grab; }
        span:active { cursor: -moz-grabbing; }
      &lt;/style&gt;
  
      &lt;script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5.2/jquery.min.js"&gt;&lt;/script&gt;
      &lt;script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.16/jquery-ui.min.js"&gt;&lt;/script&gt;
      &lt;script&gt;
        $(function(){
          $('#sortable').sortable({ handle: 'span' });
          $('#sortable span').disableSelection();
        });
      &lt;/script&gt;
    &lt;/head&gt;
    &lt;body&gt;
      &lt;ul id="sortable"&gt;
        &lt;li&gt;&lt;span&gt;grab 0 here&lt;/span&gt; I'm 0!&lt;/li&gt;
        &lt;li&gt;&lt;span&gt;grab 1 here&lt;/span&gt; I'm 1!&lt;/li&gt;
        &lt;li&gt;&lt;span&gt;grab 2 here&lt;/span&gt; I'm 2!&lt;/li&gt;
        &lt;li&gt;&lt;span&gt;grab 3 here&lt;/span&gt; I'm 3!&lt;/li&gt;
        &lt;li&gt;&lt;span&gt;grab 4 here&lt;/span&gt; I'm 4!&lt;/li&gt;
        &lt;li&gt;&lt;span&gt;grab 5 here&lt;/span&gt; I'm 5!&lt;/li&gt;
        &lt;li&gt;&lt;span&gt;grab 6 here&lt;/span&gt; I'm 6!&lt;/li&gt;
        &lt;li&gt;&lt;span&gt;grab 7 here&lt;/span&gt; I'm 7!&lt;/li&gt;
      &lt;/ul&gt;
    &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>The problem is that the <code>:active</code> cursor stops working.  I'm not sure why, it works when I don't use <code>sortable</code>, but afterwards, when I pop it up in firebug, I can see that the <code>:hover</code> cursor is being applied, but no shift to <code>:active</code>.</p>
  
  <p>(for simplicity, I'm using <code>-moz-grab</code> and <code>-moz-grabbing</code> in my above example, which don't work in all browsers).</p>
  
  <p>Any ideas what might be going wrong?</p>