I have a Facebook account which works perfectly well except that when I try to post comments on 2 groups I belong to, they won't submit. My Timeline postings work ok. Been over my settings time and time again but to no avail.
Probably won't work but try a different browser. Don't know if you're using an ipad or not as sometimes the Facebook app plays up, so I have to get into it through the browser and use the desktop site.