The More the Merrier (1943)

Other mistake: When Benjamin Dingle first steps into Connie Milligan's apartment, a closed bedroom door in the background inexplicably swings wide open on its own, right in the middle of the shot.

Charles Austin Miller

Continuity mistake: When Mr. Dingle walks past all the other prospect tenants for the apartment, the young fella at the top of the stairs on the right is holding his newspaper in 3 different ways in separate consecutive shots. Not just that: the No Vacancy sign Dingle hung on the letterbox is tilted differently in separate shots. (00:04:30)

Sammo

Benjamin Dingle: What's your name?
Joe Carter: Carter.
Benjamin Dingle: Bill Carter?
Joe Carter: Joe Carter.
Benjamin Dingle: I used to know a fellow named Bill Carter.
Joe Carter: Wasn't me.
Benjamin Dingle: Don't you suppose I know that?
Joe Carter: What'd you ask for, then?
Benjamin Dingle: I guess I know what Bill Carter looked like.
Joe Carter: Not like me.
Benjamin Dingle: Oh, then, you know Bill Carter.
Joe Carter: No, I don't, but he sounds like a great guy.

Joe Carter: What do you do?
Benjamin Dingle: I'm a well-to-do, retired millionaire. How 'bout you?
Joe Carter: Same.

Connie Milligan: You - look messy. Don't you ever brush your hair?
Joe Carter: I suppose Mr. Pendergast combs his hair every hour, on the hour.
Connie Milligan: Mr. Pendergast has no hair.