Situation.
We are in the 'Moderator' group (as configured in the CB configure interface). And there are several joomla/cb users in the system.
In the cb.menu.php the check performed is cbCheckIfUserCanPerformUserTask( $user->id, 'allowModeratorsUserEdit').
And we can see 3 menu items in the view user profile list under Edit tab:
Update user profile, Update user image, Remove user image.
We are trying to upload the user's avatar - it is OK.
We are trying to update/edit user profile - it hangs with the message:
You cannot edit a `registered`. Only higher-level users have this power.
As we can see, different security check is performed in that point.