title: Theme issue on an ListActivity
body: <p>I have a ListActivity on wich I apply a light theme using the manifest.</p>
  
  <p>The theme is defined as follow</p>
  
  <pre><code>    &lt;style
      name="Theme.Light"
      parent="android:Theme"
  &gt;
      &lt;item
          name="android:windowBackground"
      &gt;@android:color/background_light&lt;/item&gt;
  &lt;/style&gt;
  </code></pre>
  
  <p>The idea is to make the ListActivity white instaid of the default black color.</p>
  
  <p>The list is showing white as expected but it turn black as soon as I scroll it.
  It turn back white when I stop scrolling.</p>
  
  <p>Thanks</p>