Audio problem: When the movie ends and Fran is waiting for Jeff listen to the laughs in the background: "oooooah (laughs) ooh (laughs)." This exact same track repeats itself three times in a row, revealing it's a short clip played in a loop.
The Apartment (1960)
1 audio problem
Directed by: Billy Wilder
Starring: Shirley MacLaine, Jack Lemmon, Fred MacMurray, Ray Walston
Factual error: Fran the elevator operator stops on the 19th floor and takes Baxter 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.
J.D. Sheldrake: Ya know, you see a girl a couple of times a week, just for laughs, and right away they think you're gonna divorce your wife. Now I ask you, is that fair?
C.C. Baxter: No, sir, it's very unfair... Especially to your wife.
Trivia: Shirley MacLaine kept improvising, much to the chagrin of the writer and director. She was made to do multiple takes of one sequence because she kept missing a word out.