Jumping into BlackBerry World today I discovered an update for Facebook ready to be installed. This was on my Z30 where it was showing as version 10.4.21.2. I then did the same on my Passport, but this version is 10.4.30.2.
Just to confuse things even more there isn't a changelog for this one so all I can say is that if you like to keep up to date with new versions then go and grab it. Chances are that if you have been running the latest beta I suspect you won't notice a difference. If you do though sound off.
If you are on another device or seeing different versions to me please let us know in the comments.