Found these while doing some testing for subgroups.

When creating a subgroup, in the Visibility box, the first choice is "Subgroup listed in parent group, messages publicy viewable".  publicy is missing the second l (ell).  (Probably just a lack of coffee that day since the boss is so mean. ;>)

When deleting a subgroup, there's a red warning that the name can't be reused for some length of time.  This is correct for a main group, but doesn't apply to subgroup names, so isn't needed.

Thanks,
Duane