I have a problem where when I try to select one of my notifications it tries to load the mobile version of facebook on the web browser and has an error message in a pink box at the top of the page. It's really annoying that the notifications open in the browser instead of the facebook app itself...
Mine is doing this too. It's bad enough that the app is horrible, but when it's not working like it usually does in its own horrible way, it's so frustrating.
I've heard through other people that facebook is changing around its look/layout.
This could be effecting the Android app. Just a theory.