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)
Visible crew/equipment: As Benjamin runs up to the church we see a crew member move something out of the camera's view in the lower left hand portion of the screen. (01:41:15)
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)
Revealing mistake: After he bangs on the second floor church window, Elaine screams his name and Benjamin runs down the steps to the main floor of the church. Mr. Robinson meets him halfway down as they fight and if you look closely Benjamin's white windbreaker was made to just fall apart as Mr. Robinson tugs on it. (01:43:00)
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)
Visible crew/equipment: During the scuffle at the church between Benjamin and Mr. Robinson on the stairs, you can see the shadow of the camera on the wall on the left side of the screen. (01:43:17)
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)
Visible crew/equipment: As Benjamin and Elaine run to the back of the bus you can see the shadow of the cameraman moving across the people on the left. (01:43:55)
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)
Factual error: There is a scene with Benjamin Braddock going to Berkeley, but his car is driving on the upper deck of Bay Bridge which only goes in the direction of San Francisco.
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.
Plot hole: In one scene, he's driving from Los Angeles to Berkeley in a hurry, and crosses the bridge again (in the wrong direction). But the most direct route from L.A. to Berkeley doesn't require you to cross the Bay Bridge in EITHER direction.
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.
Factual error: At one point Ben Braddock is in a cafe on Telegraph Avenue drinking a beer. At the time the film was made, no restaurant within a mile of campus was allowed to serve alcoholic beverages.
Other mistake: The copyright date is 1967. In the final title frame at the end of the movie, the copyright date in Roman numerals is incorrect. The V and the X are inverted. It reads MCMLVXII. The correct Roman numeral is MCMLXVII.
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.
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.
