Are you among the many beta testers for BBM on iOS? If so, you'll want to check Test Flight for the latest release. A new update has arrived as v2.7.0.20 and it has a few things for everyone to test out. Some of them are new, some of them apparently may have been reworked and just need more testing. You can have a look at the noted changes thanks to change log from BlackBerry.
Full story from the Crackberry Blog...
