There's this code I get on this particular post instead of the thumbnail. The thumbnail appears correctly when the link is shared on facebook:
Interesting interview of Donnie Maclurcan of the Postgrowth institute
| Extraenvironmentalist’ image=’http://www.extraenvironmentalist.com/wp-content/uploads/2013/07/donnie3.jpg’]Donnie Maclurcan is co-founder of the Post Growth Institute, an international group exploring innovative paths to global prosperity that are not dependent on economic growth.
See about 15 hrs ago here: http://commonsabundance.net/activity/