Per Group limit resets to global setting with Organic Groups 6.x-2.0

Issue Summary

The ability to set a membership limit for an individual group does not seem to work with Organic Groups 6.x-2.0.

I had set the global limit to 0 (zero). I then reset the individual group limit for one group to 3. The group limit was reset to 0 after saving changes. To confirm, 5 members were able to join the group.

Shame. I need something like this.

Thanks for your efforts.