I have had problems with og:image on my wordpress websites. Facebook debugger kept telling me "The 'og:image' property should be explicitly provided, even if a value can be inferred from other tags."
I hade set it up the go:image properly in SEO by Yoast and I searched through a lot of forums for a solution to the problem but none of the solutions I found worked for me.
Finally I tried to deactivate the other plugins on my wordpress to see if there was any conflicts between them and SEO by Yoast. It turned out that it was the official plugin from Facebook that screwed up the og:image. Now that Facebook plugin is deactivated everything works like a charm.
The problem is that I really would be able to use the Facebook plugin. Is there any known solutions to the conflict?