title: jQuery UI not creating a placeholder
body: <p>I'm trying to make an existing div list sortable. I'm stuck with the placeholder added by the sortable widget. If i check the demos on the web site I can see that the dragged item is moved in the list markup as I drag it around. But in my example I can only see the styled placeholder but it's not moving between the elements. And the dragged item always snaps back to the starting point i released. Does it not work with divs as expected or what am I missing here?</p>
  
  <pre><code>&lt;div class="dummy-deviceList"&gt;
    &lt;div class="dummy-device ui-sortable" data-dummy-device-id=""&gt;
      &lt;div class="dummy-device-main"&gt;
        &lt;div class="dummy-icon dummy-icon-deviceStatus-ok"&gt;&lt;/div&gt;
        &lt;div class="dummy-device-descr"&gt;
          &lt;div class="dummy-device-descr-main"&gt;FOO1&lt;/div&gt;
          &lt;div class="dummy-device-descr-more"&gt;BAR1&lt;/div&gt;
        &lt;/div&gt;
        &lt;div class="dummy-link dummy-link-context dummy-icon dummy-icon-context"&gt;&lt;/div&gt;
        &lt;div class="dummy-link dummy-link-centerMap dummy-icon dummy-icon-centerMap"&gt;&lt;/div&gt;
      &lt;/div&gt;
    &lt;/div&gt;
  
    &lt;!-- More items here --&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>Demo</p>
  
  <p><a href="http://jsfiddle.net/fuAL2/" rel="nofollow">http://jsfiddle.net/fuAL2/</a></p>