Continuity mistake: During his questioning inside the house, Clemens' hair goes back and forth from falling over his forehead to brushed back several times between takes. (00:05:00)
Character mistake: Charlie tells Thedy that the hair ribbon embroidered with her name cost 65 cents, "five cents a letter." But her name is Thedy Sue Hill, which is only 12 letters - or 60 cents worth. (And no, the extra is not due to a sales tax, which in 1962 would have been two cents, tops, and didn't even exist yet in many states.). (00:12:00)
Suggested correction: This was not an error. Charlie is a bumpkin. He was ripped off due to his lack of intelligence.
Factual error: After emptying the safe, Gerald shoots the night watchman through a glass door. But somehow, the glass never breaks. (00:02:05)
Continuity mistake: Gerald holds the wine glass upside down, taping the broken stem back on. But when the shot cuts, he's instantly holding it upright instead. (00:14:30)
Continuity mistake: When Clemens is stopped by the police, the shoulder of his raincoat is clean, then has wet leaves all over it, then is perfectly clean again. (00:02:30)
Revealing mistake: Gerald hides what are supposed to be thousand-dollar bills inside Emmy's magazines. But the money he's handling all carries George Washington's portrait. It's one-dollar bills. (00:30:00)