title: Can't login to Parse with Facebook account
body: <p>I'm developing in corona. I'm login(using develephant.net mod_parse.lua) into Parse.com with my Facebook account, which did work just fine before. But now I keep getting this error from Parse:
  I/Corona (14497): Parse Code: 251
  I/Corona (14497): Error: The supplied Facebook session token is expired or invalid.
  I/Corona (14497): im logged in</p>
  
  <p>I have checked with Facebook on <a href="https://developers.facebook.com/tools/debug/" rel="nofollow">https://developers.facebook.com/tools/debug/</a> and get this feedback:
  Issued  1392307353 (22 hours ago)
  Expires 1397491353 (in about 2 months)
  Valid   True
  Origin  Mobile Web Faceweb</p>
  
  <p>Did anybody expirience this before have any ideas why this happened?</p>