title: addthis IE fails display multiple images in facebook sharing
body: <p>I have a web page I want people to share on facebook. So I placed addthis buttons for facebook, twitter ... and added some extra code
      <pre>
      &lt;meta og:title ... />
      &lt;meta og:url .../>
      &lt;meta og:image ... /> for each image
      </pre></p>
  
  <p>when I click the button, I can see title, url, site name (derived from url), and an image.
  In Chrome, I can choose within multiple images, but not with IE (IE9 under windows7 64bits)
  I have the same issue with sharethis.
  But when I paste the page url in facebook directly, both IE and Chrome handle it properly.</p>
  
  <p>Is this an issue with adthis and similar social plugin, with IE specifically?
  I also tried to run with compatibility mode on and off with the same result.
  How can it be fixed?</p>