I think this line in manual:
should be changed to:
Because default vb behaviour seems to serve this field in user cp/edit profile section IF it is blank even if admin sets it to ONLY AT REGISTRATION.
Field Editable by User - If disabled, this field will not appear to user when they edit their profile. Only at registration allows the user to only edit this field at registration or if the field is blank and set to be required.
Field Editable by User - If disabled, this field will not appear to user when they edit their profile. Only at registration allows the user to only edit this field at registration or if the field is blank