Visible crew/equipment: When the anxious Benjamin takes Elaine on their first date (against Mrs. Robinson's wishes), he's driving his convertible Alfa Romeo fast and a bit recklessly on the crowded freeway. This brief nighttime scene is one continuous "backseat" shot from behind Ben and Elaine, looking out of the car's front windscreen. As the lighting shifts erratically, the distinct shadow of the camera and audio rigs with vertical cables repeatedly moves left and right across the entire shot for the duration of the scene. (00:58:09)
Audio problem: When Ben and Elaine go on their first date, they're driving really fast in his car and talking. When each of them talks, the wind noise is evident in the audio. This means they used the original audio on scene, instead of replacing it later (known as ADR). The cuts in the audio here are very noticeable.
Continuity mistake: As he leaves the apartment Mr. McCleery tells Benjamin to, "get out of here". If you look closely at the light fixture over the pay phone in front of him you'll see it only has one light on it. In the next shot as he rounds the staircase we see it again and there are two lights on it. (01:33:15)
Continuity mistake: In the hotel room Mrs. Robinson makes Benjamin promise that he will never take Elaine out. If you look closely the purple chair in the middle of the room has been moved out about a foot away from the wall so that it's now blocking her line of sight and obscuring the bottom of the lamp that's in front of the window. When we saw this spot before as they were lying in bed the bottom of the lamp could easily be seen from the bed. (00:54:05)
Continuity mistake: Benjamin and Mrs. Robinson have a rendezvous and while they're in bed he gets her to talk about where Elaine was conceived. She turns out the light and the conversation continues a while in the dark until Benjamin indicates that he might take Elaine out on a date. She turns on the light again and gets ready to rip his head off and two drinks appear where there were none before under the lamp on the left of the screen. (00:49:40)
Continuity mistake: After Benjamin and Mrs. Robinson have a fight about Elaine she sits on the side of the bed putting on her stockings as she gets ready to leave. Benjamin says, "Oh no, look I like you" and in the next shot as the camera shifts angles a chair appears in front of Mrs. Robinson that wasn't there before. (00:53:10)