Continuity mistake: Mr. Robinson confronts Benjamin in his apartment about the affair with Mrs. Robinson. As Mr. Robinson sits by the window the lamp shade to his right is dark, later when we see the lamp shade again as he gets ready to leave it's lit up. (01:32:15)
Continuity mistake: The scene with Mr. Robinson in Benjamin's apartment lasts two and a half minutes. When Benjamin walked into the apartment his coat is soaking wet but as he leaves and walks past Mr. McCleery it's dry. (01:32:50)
Continuity mistake: Mr. Robinson leaves Benjamin's apartment and calls him filth and scum as Mr. McCleery the landlord sits at the top of the steps listening. The painting on the wall to the left of the steps is not in direct light but in the next shot when Benjamin walks by the lighting has changed and a dark shadow cast by the frame against the wall is visible. (01:32:50)
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: Mrs. Robinson picks up the phone to call the police on Benjamin who has broken into her house but if you look closely she never dials the phone. (01:35:10)
Suggested correction: Since we never see the police come in, we're not for sure she actually called them as Mrs. Robinson is known to lie and manipulate. All we hear are tires screeching and as we see no police pursuing him, it's unlikely.
Continuity mistake: Benjamin breaks into the Robinson's house and runs upstairs looking for Elaine but finds Mrs. Robinson instead. As she picks up the phone to call the police we see nothing on the bed except a blue pillow. In the next shot there's a lot of other things now covering the blue pillow. (01:35:15)
Continuity mistake: Benjamin goes into the bathroom looking for Carl Smith's friend Carter and there are many cans of shaving cream etc. in front of all the guys standing at the 5 sinks. In the next shot the shaving cream cans are gone. (01:37:45)
Continuity mistake: Benjamin drives around looking for Elaine's wedding and stops at a gas station to use the pay phone. The call goes through and Dr. Smith's answering service says, "657-2036" but if you look closely that's not the phone number that we see him dial. (01:39:10)
Continuity mistake: Benjamin runs around the side of the church then up some steps in order to get in. When we first see the second floor entrance it's in bright sunlight then in the close-up as he gets to the door it's not. (01:41:30)
Continuity mistake: Benjamin pulls a cross off the window of the church and uses it to lock the people inside the church. If you look closely when we see the church from the outside the cross is not there and before he pulls it off the window there's a curtain in front of it, which disappears between shots. (01:43:15)
Continuity mistake: Benjamin uses the cross that he pulls off the window to keep the wedding guests away from Elaine and himself. Right before they exit the church he charges the bystanders one last time then turns around and holds the cross as if he's going to swing it through the door. In the next shot he's just holding it outstretched in his hands. (01:43:25)
Continuity mistake: In the last shot of Benjamin and Elaine inside the bus he's facing forward and she's sitting slightly to the right of the center window divider on the back of the bus. In the next shot he's sitting sideways with his arm resting on the top of the back seat and she's moved about eight inches to the right. (01:44:45)
Continuity mistake: When Benjamin is running up the stairs of his rooming house with a stack of presents and a big bouquet of flowers, the flowers are pointing down held by his left hand with the presents in front of him. When he rounds the corner of the stairs, the flowers are upright in front of both him and the presents.
Continuity mistake: When Benjamin is in his apartment, there is a Coors can on top of the refrigerator. When the camera comes back to the refrigerator, the can is gone.
Continuity mistake: When Mrs Robinson gets out of Ben's car, which doesn't have the top down, her hair is notably messy but, not soon after, her hair is fine, and it is done up in an elaborate way, so she couldn't have fixed it herself.
