Three weeks ago, Facebook formally removed application content from its notifications channel altogether. However, even after March 1st, Facebook still delivered “wall post” notifications to recipients when an application was used to create a post on a friend’s wall.
However, since last week, it appears that for many users and applications, these app wall post notifications have not been getting delivered, and it’s affecting traffic for many apps, significantly in a few cases. We don’t know if this is a bug or an intentional deprecation by Facebook, but we’ll let you know when we do. We would guess this is not intentional, because we imagine Facebook would want users to always be notified when a friend posts content of any kind to their wall.
A Facebook spokesperson says they are looking into the matter. A bug has been filed related to this here.
Update: According to Facebook, this is indeed a bug, as we guessed, and has now been fixed. Apps should now see wall post notifications resuming.