It appears as if some Windows Phone users are having some issues with Facebook integration. The problems, which are affecting an apparent small amount of users are effecting the Facebook feed as well as some problems with Facebook chat.
According to The Verge, users started reporting problems with Facebook integration around 12 hours ago. A tweet from Joe Belfiore has confirmed the outages, and comes with word that Microsoft is working on the problem.
If you’ve been experiencing promblems, hold tight as Microsoft will hopefully have a fix for this soon.
FYI – some folks have experienced problems with Facebook feeds in WP8… the FB team is working on a fix as we speak.
— joebelfiore (@joebelfiore) November 7, 2013