Factual error: Jack Lemmon cooks spaghetti for Xmas dinner. On New Years Eve he picks up the tennis racket, through which he had poured the spaghetti, and one piece hangs limp from the racket. It would of course, have long dried and be hard as before cooking.

Factual error: Fran the elevator operator stops on the 19th floor and takes Baxley to the 27th floor. But when they arrive on 27 (and the entire time they're supposedly ascending to it), the light for the 19th floor on the elevator's control panel remains lit.

Factual error: At the end of the scene where CC Baxter meets the doctor for the first time in the hall, Baxter is standing in the doorway of his apartment as the doctor enters his own apartment. From that view, you can see into Baxter's kitchen, which has a window - right where the apartment the doctor just entered is located. That could not be an outside wall.