I have another question on this topic.
In your theme options you have your “SOCIAL LINKS” header. Do these generate og: tags? I’m sorry, I’m a bit of a newbie to wordpress, and I know you’ve answered this at the top.
By the way, tt wasn’t Yoast. I originally agreed with you on this as I had read forum posts saying that sometimes the tick box to de-select Open graph settings on this plug-in didn’t always work. After a couple more days of working through the problem I ended up removing Yoast completely and installing Michael Torberts All-In-On SEO pack.
Same result
The reason I am asking again about this was this post I came across.
http://wordpress.org/support/topic/failed-posting-to-your-facebook-timeline-multiple-ogurlvalues?replies=39
I know none of these use your theme but they are coming up with virtually the same problems and a couple mention having social share buttons within the theme.
Thanks again for your time on this, it is much appreciated.