Oxwall 1.72 with the updated Group plugin.

I have a new member just joined today - all of the groups are viewable by everyone.  He can see the list of groups but when he clicks into a group he is met with a not authorized page.  I don't remember seeing this behavior in previous versions.  Is there something else I should be checking?
 
In fact, I just added him to a group manually (directly in the db) and he is still getting locked out.

You don't have permission to access the page.