Audio problem: When Malone and Roxton are fighting, Roxton hits Malone's hand, but we hear the sound effect used for a punch to the face.
Audio problem: When Norman runs down from the Bates house to the motel and meets Marion, he says "Gee, I'm sorry I didn't hear you in all this rain. Go ahead in, please." But you look closely, it looks like Norman is barely moving his lips. In fact it looks like Marion is saying something instead. (00:27:50)
Audio problem: When Merritt is arguing with her professor, she says, "We're supposed to be intelligent" but her lips are actually saying "Don't be afraid; my opinion is yes." This is the exact same shot used a moment later when she actually says this line. (00:07:10)
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.
Audio problem: During David and Alan's argument in the rainstorm, neither actor's lip movements match the dialogue. (01:14:00)
Audio problem: When Bugs is performing his "Brahms Lullaby" outside Sam's bedroom, we hear him singing the music but his mouth isn't moving.