title: How do I post a Link to Facebook without a thumbnail?
body: <p>I'd like to post a Link to Facebook using the <a href="http://developers.facebook.com/docs/reference/api/post" rel="noreferrer">Graph API</a>, but I'd like to be able to avoid a thumbnail image.  Facebook's web interface has a no-thumbail checkbox while posting an image; I'd like to simulate this from my own application.</p>
  
  <p>I've tried specifying an empty string for both the <code>source</code> and <code>picture</code> arguments, but Facebook still fetches a thumbnail image for the specified <code>link</code> regardless.  </p>
  
  <p>For example, I've tried this, but a thumbnail image still shows up:</p>
  
  <pre><code>curl -F 'access_token=...' \
       -F 'message=Link with empty source and empty picture' \
       -F 'link=http://stackoverflow.com' \
       -F 'picture=' \
       -F 'source=' \
       https://graph.facebook.com/me/feed
  </code></pre>
  
  <p><em>UPDATE: <a href="http://community.dlvr.it/dlvrit/topics/unwanted_facebook_thumbnails" rel="noreferrer">This support forum</a> suggests that this is a bug with Facebook, and they suggest posting a 1x1 pixel clear image.  I'd prefer a better workaround than this.</em></p>