title: Svg image does not show in Firefox
body: <p>Inside a simple SVG element I have an image.</p>
  
  <ul>
  <li>Chrome: Version 28.  - works perfect</li>
  <li>Firefox: 22.0 - no image is drawn</li>
  <li>Opera: 12.16 - image is show 4 times larger than normal</li>
  </ul>
  
  <p>Code:</p>
  
  <pre>
      &lt;svg width="500px" height="500px" viewBox="0 0 70 70">
           &lt;image x="0" y="0" width="10" height="10" 
                 id="knight" xlink:href="/images/knight.svg" />
      &lt;/svg>
  </pre>