title: Margin auto fails IE11
body: <p>if you <a href="http://personalizatumovil.es/" rel="noreferrer">check my website</a> with the browser Chrome you can see how the div called .bg-content works fine with this style:</p>
  
  <pre><code>.bg-content {
      max-width: 605px;
      height: 149px;
      position: absolute;
      top: 62px;
      font-family: sans-serif;
      margin-left: auto;
      margin-right: auto;
      left: 0;
      right: 0;
  }
  </code></pre>
  
  <p>But if you open my website with Internet Explorer 11 the div .bg-content is not centered, he is floating to left.</p>
  
  <p>How can I fix this?</p>