We use v184.108.40.206 and ran the facebook Object Debugger.
What we found out was this:
Open Graph Warnings That Should Be Fixed
Extraneous Property: Objects of this type do not allow properties named 'shareaholic:site_name'.
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: 'shareaholic:site_name'
And further down:
Raw Open Graph Document Information
Meta Tag: <meta property="shareaholic:site_name" content="NameOfMySite" />
We do NOT remember adding any of these:meta property="shareaholic:site_name". How did they get there and why?
Could someone explain what it all means and how it can be fixed/removed?