When Harry is telling Don about a client wanting Salvatore fired, the top button of his coat goes from being unbuttoned to buttoned between shots.
Suzanne (Sally's old teacher) is wearing a form-fitting Bowdoin College t-shirt when Don stops her running. Bowdoin (Brunswick, Maine) was an all male college until 1972, and this takes place in 1963. Although conceivable that she got the shirt from a boyfriend, brother or father, it seems unlikely.