It's an OPEN group
Privacy: Open
Public tab can no longer be viewed in 2.1.*, in 2.0.* this worked fine and what by the looks of it is the way people wanted an "OPEN" group to work like.
So to sum up, its a OPEN group with an PUBLIC tab, that could be viewed in 2.0.* but can not now be viewed if you upgrade to 2.1.* what breaks how my sites groups work and run.