title: Auto margins don't center image in page
body: <p>In <a href="http://jsfiddle.net/XnKDQ/" rel="noreferrer">this example</a> the image is not centered. Why? My browser is Google Chrome v10 on windows 7, not IE.</p>
  
  <pre><code>&lt;img src="/img/logo.png" style="margin:0px auto;"/&gt;
  </code></pre>