Yea,Rick put something in there if a user was in multiple groups with icons. So they can select one and only one. No way to determine which correct one to use with out user intervention was the reason.
So if say a user is a admin and a moderator with the default settings they would need to goto mystuff and select one or the other for a icon.
So I believe even if they are only in one group with a default icon for the group, they still need to select it in their profile.
