When BJ and Margaret are talking about a patient, Loretta Swit is writing on a clipboard. The fingernails of her left hand can be seen to be over 1/2 inch long. No nurse, especially a head nurse, would have such long fingernails.
After the vaudeville show when Brandy and Margaret are talking, a boom mic shadow can be seen next to Brandy's head.
When introducing himself to Brandy, Colonel Potter says, " whenever I hear a C 42 rev up...". There was no C-42 aircraft in general use for American forces at any time. Most likely, he was meant to say C-47, The ubiquitous cargo aircraft for US armed forces in the second world war.