Continuity: When Katharine Hepburn carries the white carnations out of the elevator (which have just been given to her by Gig Young), they turn pink when she steps off the elevator and walks outside.

Other: When Richard Sumner and Miss Watson are standing in the rain about to enter her building, she calls him darling or Charlie (it's hard to tell). Either one would be an error since they are not chummy at this point and his name is Richard.