Hi
I've noticed a bit of a cul de sac in the UX for Groups
IF you go to a Group and then click on one of the links from the horizontal menu below the main image
..there is no obvious way back
You can return by clicking on the small avatar image but that's far from intuitive - it seems there is a 'Group' or 'Home' option missing on that flat menu to take you back to where you started
RG