Even if it seems there is no more support for this plugin, I have to try:
If I try to share the url of my site or any contents from the blog, I get a warning that the site is blacklisted (in fact, it is not... both site and IP are checked as whitelisted) in Facebook and G+. Trying to share the url without /lang/xx/ seem to work at times.
The site in question is http://www.aegis-strife.net. You can try to share anything on FB and you will most likely get a warning and the content will be blocked.
Any ideas on this one? I already contacted Facebook but I wonder if they will reply back.
Thanks beforehand, I hope you can help me :(