Continuity: At the beginning of the movie, Harry's van has bucket seats, yet later on when the "gas-man" rides along, he is sitting on a bench seat in-between Harry and Lloyd.

Continuity: In the scene where Lloyd tackles Mary on the hotel stairs, she is wearing black pantyhose. By the time they get to the hotel room, she has miraculously changed into grey tights.

Continuity: In the seen when Lloyd grabs asks if the bartender knows Mary he originally grabs the bartender with the left hand.  But in the next shot he lets go of him with his right hand.

Visible crew/equipment: When Lloyd is daydreaming about Mary as the doors to Mary's house open and Lloyd picks up Mary. He lifts up her skirt to show a little flesh, in the background you can see the feet of two crew members laying on the ground holding the doors open.

Audio problem: In the scene when Harry and Lloyd pick up the hitchhiking natives, when they were playing the mockingbird song, the guitar was playing but his hands weren't moving at all.

Continuity: In the scene where Lloyd drops Mary off at the airport and hugs her goodbye, in the background there are two men walking towards them. The camera changes to the angle behind Mary then behind Lloyd and then back to the side. When it returns to the side view the two men are farther away but still walking toward them.

Continuity: In the scene where Harry and Mary go out on the date to the ski resort, when they get into a snowball fight, the camera shows Harry, and it's snowing, but when they show Mary (who is supposed to be right beside him) it is not snowing. It keeps doing that, when it shows Harry it's snowing, and Mary it is not (or vice versa).

Visible crew/equipment: On the DVD when Harry is in the bathroom (from the ex-lax) as he sits on the toilet if you look on the floor you can clearly see the dolly track for the camera.

Other: When Lloyd states that the map says they've only drove a quarter of an inch, you will see a creek with a unusual tree growing around it. You see the same creek and tree when Harry and Lloyd pick up the "gas man".

Continuity: In the scene where Lloyd is trying on tuxedos, the shot from the back of Harry's head you see a short cigar in his mouth. In the next shot from behind (when he stands up), the cigar gets bigger.

Continuity: After leaving the diner, Lloyd & Harry are pulled over by a motorcyle cop (Harland Williams). As the cop notices the beer bottles on the floor of the van, you'll notice his hair has a curl hanging over his forehead. Right before he takes a drink of one of the bottles, the curl is gone. It cuts to Lloyd & Harry trying for a brief second , and when it cuts back to the cop saying "You'd shut your mouth if you knew what was good for ya," the curl is back.

Continuity: In the scene where Jim Carrey and Jeff Daniels are in the restaurant just before they encounter Seabass and right after they call the waitress "Flo", Jeff's coke glass is on his right side. The next shot shows it on his left, then his right, then his left again, without him touching it.

Continuity: Right before Harry is telling Lloyd that he doesn't bet, they show an aerial shot of the van near a pond and a bridge, showing that they had already made it past this point. But then when Joe pretends to be a hitchhiker, he's in the same spot where the aerial shot was shown. Joe is being picked up by Harry and Lloyd at a place they have already passed.

Continuity: Towards the beginning of the movie at Lloyd and Harry's apartment during the scene when Harry is behind the couch yelling at Lloyd about going to Aspen you can see an empty beer bottle, when Harry walks around the Couch again the beer bottle has moved.

Continuity: In the shot early in the movie when Lloyd gets his wallet trapped in the newspaper machine it shows his wallet, however in the very next shot you can see that his wallet is not there.

Revealing: In the scene where Lloyd and Mary are going to the airport, you can see a white van out the rear window. The driver is turning the steering wheel, but he keeps going straight.

Continuity: During the snow owl benefit, Mr. Swanson (Mary's dad) is introduced. The next shot is from behind the stage facing out to the crowd and you see Mary's stepmom (Teri Garr) raise her arm in the air as if to "present" Mr. Swanson. The very next shot is from the audience perspective facing the stage, and Teri's arm is at her side, and she raises it up again to present him.

Continuity: When Harry and Lloyd go to the preservation dinner, Nicholas is standing by the front door. A few minutes later, he is up on the stage starting the presentation and introducing Mr. Swanson. Then instantly, he is back by the front door talking to his comrade. There is no way Nicholas could have done what he did in so little time - he doesn't look out of breath -- and without being seen.

Other: In the scene where Lloyd is in the bar and he has just said "everything has to be perfect", he gives a big sigh and the camera is facing his front. Then the camera is facing the barman and he gives the same sigh. You can see from how his face changes from smiling to a frown.

Continuity: When Lloyd is robbed by the old lady, it is night but when he gets back to the apartment, it is daytime.