The auto-published has gone wrong. It pushes links to post attachments (images) instead of the actual post. The title, excerpt and image are correct, just the link is wrong.
And also I noticed that if a post is without an attachment that results in an empty post to the FB wall.
I'm using the development version of the plugin from SVN. I've updated it to the latest revision. I'll keep an eye on it and report if the issue persists.