title: Will Facebook re-scrape the permalink URL even if og:url is set to the redirect target to avoid an error in Debugger?
body: <p>For my Open Graph objects I made permalinks like</p>
  
  <p>(1) <code>http://www.example.com/go?id=123456</code></p>
  
  <p>that redirect to a non-permanent URL like</p>
  
  <p>(2) <code>http://www.example.com/controller/something.php?session=abc&amp;page=654321</code></p>
  
  <p>When I set <code>og:url</code> to (1), the <a href="http://developers.facebook.com/tools/debug" rel="nofollow">Debugger</a> shows a "Circular redirect path" error, independent of whether I use a 301, 302, 303 or 307 redirect.</p>
  
  <p>When I publish an Open Graph story that refers to an object with (1) as URL, on Facebook the link to the object is (2).</p>
  
  <p>When (2) changes, will Facebook get that change after 7 days by re-scraping (1)? I'm unsure because I cannot see (1) anywhere on Facebook's GUI.</p>