Hello,
In general your plugin seems to work perfectly, and thanks for that! But according to https://developers.facebook.com/tools/debug I get the following small error:
Parser Mismatched Metadata:
The parser's result for this metadata did not match the input metadata. Likely, this was caused by the data being ordered in an unexpected way, multiple values being given for a property only expecting a single value, or property values for a given property being mismatched. Here are the input properties that were not seen in the parsed result: 'og:type, og:title, og:site_name, fb:app_id, og:description, og:locale:locale'
This is for the URL azhopsandvines.com.
Thanks again for the very handy plugin.
http://wordpress.org/extend/plugins/wp-facebook-open-graph-protocol/