Just updated, app crashes on opening. I'm on 4S running 6.1.2 JB.
I deleted FB app and reinstalled, it opened to let me enter login credentials, now it crashes upon loading news feed. I can see the news feed for about 3 seconds, then the app quits. Every time.
Previous update worked fine. Hope I have it backup on my Mac. Will be downgrading FB app when I get back to my computer.