title: Facebook share dialog doesn't pick up on og:image
body: <p>I want to share a link to a website through a Facebook status: <a href="http://www.pledgehub.com/d/2/test-fundraiser/" rel="nofollow">http://www.pledgehub.com/d/2/test-fundraiser/</a></p>
  
  <p>However, while the <a href="https://developers.facebook.com/tools/debug/og/object?q=http%3A%2F%2Fwww.pledgehub.com%2Fd%2F2%2Ftest-fundraiser%2F" rel="nofollow">Facebook open graph linter</a> says that the image referenced in the html:</p>
  
  <pre><code>&lt;meta property="og:image:url" content="http://pledgehub-1.s3.amazonaws.com/icon_4060.png"&gt;
  </code></pre>
  
  <p>is valid, pasting the link into a status update dialog does not show an image preview, even though running a link through the linter is supposed to invalidate any cached image values on Facebook's end. This has persisted for >24hrs at this point, and I've never gotten an image to display.</p>
  
  <p><strong>Edit1</strong>: The rabbit hole grows deeper...</p>
  
  <p>I can hack the sharer.php url into showing the image like so:</p>
  
  <pre><code>https://www.facebook.com/sharer/sharer.php?s=100&amp;p[url]=http://www.pledgehub.com/d/2/test-fundraiser/?s=fb&amp;p[images][0]=http://pledgehub-1.s3.amazonaws.com/icon_4060.png&amp;p[title]=Test%20Fundraiser&amp;p[url]=http://pledgehub.com/d/2/test-fundraiser/&amp;p[summary]=Test%20Organization%20is%20raising%20$8000%20in%20Test%20Fundraiser.%20Help%20them%20reach%20their%20goal.
  </code></pre>
  
  <p>but when Share Link is hit, the image disappears.</p>
  
  <p><strong>Edit2</strong>: Problem can be eliminated on AWS's end; the bare image can be shared with a preview using both the http and https urls.</p>