No one ever accused Facebook of being swift or thorough with its app updates, but they're at least usually very welcome when they arrive. Back in 2011, the social network introduced 'Timeline', the now-mandatory profile layout that gives you one giant photo at the top, with a secondary profile picture in the bottom-left corner. Up until recently, you couldn't change your cover photo on mobile. Now, in version 2.2, you can.
If there are any other changes to this version, Facebook isn't letting on about it. Here's the entire changelog:
Change your cover photo right from your timeline.
Cool update, Facebook.