No answer for you. However, I am having a similar problem. I have a new iPad 2 (three months old) with iOS 5.1.1. I just recently started to use Facebook on the iPad, for four different accounts. One of the accounts I had used a few times, no problem. Today I added the other three and they seem to work fine. However, my original account now will not allow me to see newsfeed. "Sorry, something went wrong". I can see my wall, photos and other features. It's only newsfeed which is messed up and only on one of the four accounts. If I discover a solution, I will post it.