title: The background image in the span won't show without any text in the span tag
body: <p>The span below will not background image if I remove the inner text xxx</p>
  
  <pre><code>&lt;span style='background-image:url("http://gifsoup.com/web/images/soc4.gif")'  style="height: 30px;"&gt;
   xxx
  &lt;/span&gt;
  </code></pre>
  
  <p><em>However it works without the xxx in the compatibility mode.</em></p>
  
  <p>How do I make it work without any inner text?</p>