Facebook apps using the current Open Graph API will break on April 30, 2015. Facebook emailed iPod and iPad developers to explain why their apps will break if they wait until the deadline to upgrade to Graph API v2.0.
Nothing on a social website gets old faster than looking at the default avatar. That's the square graphic meant to represent a user who hasn't uploaded a photo. There's nothing to be done about this, right? Think again: there's an API that can give all your users a unique graphic.