"Did Dick scare you off with his comment about the safety? He's simply wrong; I've had six Supers for 25 years and EVERY one of them allows the barrel to be selected with the safety in the off postition. "

'Browning, Sporting Arms of Distinction' page 114, Product Warning, "If your selective-safety can be moved in the off(fire) position, you are urged to have your gun promptly modified by an authorised Browning service center...". The paragrapg decribes how to test your trigger which consists of moving to OFF and trying to move to either side.
None of my Superposed can the barrel selector be moved from side to side if the Safety is in the OFF position. -Dick