Tom--
       Sorry, but I agree with the PCB stuffer. Square end = ANODE
                                                Chamfered end = CATHODE

    Using as reference:  AMERICAN NATIONAL STANDARD (ANSI Y32.2)
                         CANADIAN STANDARD (CSA Z99)
                         IEEE STANDARD (IEEE STD 315)
                         "GRAPHIC SYMBOLS FOR ELECTRICAL AND
                         ELECTRONICS DIAGRAMS"
        
                        ANODE (A) ----|>----- CATHODE (K)

         Hope you can understand my picture. Have a good day.
                                     Bob Vanech