title: Sortable clone helper not working
body: <p>Maybe I don't understand how clone works with sortable, but here is what I would like to do. </p>
  
  <p>When sorting an item I would like a clone of the item I am dragging remain until I stop drop the item in its new position.</p>
  
  <p>Here's the code:</p>
  
  <pre><code>&lt;html&gt;
  &lt;head&gt;
      &lt;script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"&gt;&lt;/script&gt;
      &lt;script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.2/jquery-ui.min.js"&gt;&lt;/script&gt;
  
      &lt;style type="text/css"&gt;
          .sort { width: 150px; }
          .ui-state-highlight { background-color: #000; height:2px; }
      &lt;/style&gt;
  &lt;/head&gt;
  &lt;body&gt;
      &lt;div&gt;
          &lt;ul class="sort"&gt;
              &lt;li&gt;Item 1&lt;/li&gt;
              &lt;li&gt;Item 2&lt;/li&gt;
              &lt;li&gt;Item 3&lt;/li&gt;
              &lt;li&gt;Item 4&lt;/li&gt;
          &lt;/ul&gt;
      &lt;/div&gt;
  
      &lt;script type="text/javascript"&gt;
          $(function() {
              $('.sort').sortable({
                  helper: 'clone',
                  placeholder: 'ui-state-highlight',
                  opacity: '.5'
              })
          })
      &lt;/script&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>Thanks in advance for the help!</p>