What I did:
I read and follwed your recent post on Social Media optimization (http://yoast.com/social-media-optimization-with-wordpress-seo-by-yoast/)
FB's debugtool (https://developers.facebook.com/tools/debug/og/object?q=http%3A%2F%2Fwww.hebammenblog.de) says that there is a problem with "Objects of this type do not allow properties named 'article:publisher'."
When changing the value of "Facebook Page URL" in the Plugin-Settings to my personal site (instead of the fanpage url) that value changes as expected. But of course this is the wrong url. And: The debug tool does not recognize this change at all.
Is something mixed up here? Maybe it's a bug?
In my opinion the value should be the url to the fanpage and the personal page belongs to the authors profile like it is described in your tutorial.
Question: Whats wrong here, and how to fix it? ;-)
Best Boris (www.hebammenblog.de)