title: Flex3 Combobox doesn't display itemRenderer when closed
body: <p>I have a combobox with a custom itemRenderer. The ItemRenderer displays some images and a label.
  When the combobox opens, the items in the dropdown list display perfectly, but when its closed, the combobox doesn't use the ItemRendere, but shows "[object MyItem]". Do I need another attribute to indicate that the ItemRender also needs to be used when closed?</p>
  
  <p>This is my tag:</p>
  
  <pre><code>&lt;mx:ComboBox dataProvider="{myItems}" id="itemsCombo" itemRenderer="org.test.myComboBoxItemRenderer" /&gt;
  </code></pre>