title: Posting page with dynamic image on Facebook
body: <p>I have a site in which the user creates a dynamic image, and would like the user to be able to post her creation on Facebook. The way I wanted to achieve this is via the standard "like" and "share" buttons ( using XFBML) - I dynamically change their URL to a <strong>page</strong> containing the user image.</p>
  
  <p>The problem is that Facebook posts the <strong>correct</strong> URL but with a generic picture, and not the user generated picture.</p>
  
  <p>In the past I used to give the <strong>image</strong> url - and then I would get the right picture. But this is not what I wan't now - I wan't the link to be to a full feature page.</p>
  
  <p>The target page does specify og:img to the dynamic image - but it seems FB does not use it...</p>
  
  <p>Any ideas how I can control the image FB shows on the post?</p>