title: ListItemRenderer background color
body: <p>Using flex4, I have a list with an item renderer:</p>
  
  <pre><code>&lt;mx:List id="queueView" dataProvider="{presenter.queue.items}"&gt;
    &lt;mx:itemRenderer&gt;
      &lt;fx:Component&gt;
        &lt;mx:VBox&gt;
          &lt;mx:Label text="{data.name}"/&gt;
          &lt;mx:Label text="{data.artist.name}"/&gt;
        &lt;/mx:VBox&gt;
      &lt;/fx:Component&gt;
    &lt;/mx:itemRenderer&gt;
  &lt;/mx:List&gt;
  </code></pre>
  
  <p>I have alternating colors on the list:</p>
  
  <pre><code>#queueView
  {
    alternating-item-colors: red, yellow;
  }
  </code></pre>
  
  <p>but the list items always render with a white background (it renders the colors correctly if I get rid of the renderer).</p>
  
  <p>If I set contentBackgroundColor="red" on the itemRenderer every item is red. The compiler won't accept transparent.</p>
  
  <p>How can I make the itemRenderer respect the alternating colors of the list?</p>