I had a problem with Publicize which didn't post anything to Facebook or twitter. I used Facebook debug as you describe it in the forum and had a message about the like button : "fb:admins and fb:app_id tags are missing. These tags are necessary for Facebook to render a News Feed story that generates a high click-through rate."
I disabled the Facebook and twitter like button and everything goes right now.
How can I fix the problem and allow the like button on my posts ? Thank you for your help