Visible crew/equipment: During the last sequence at the last green there are shots of the doctor and the judge (particularly the one where the judge pulls out "Billy".) If you look in the bottom left hand of the screen you can see a shadow of a camera, and at times, the head of a crew member.
Continuity mistake: At the beginning of the movie, Chevy Chase puts on a blindfold and reaches for his clubs, but he knocks a couple of them over and they land on the golf course. After he hits the ball we see a shot of him and Danny from across the pond, but the knocked over golf clubs have disappeared. (00:06:40)
Deliberate mistake: The floating candy bar that clears everyone from the swimming pool is a Baby Ruth, but Baby Ruths don't float, they sink like a rock.
Continuity mistake: During the Big Match scene, Al's character is seen sweating profusely, seemingly in an instant.
Continuity mistake: When Al is pointing out the condos he owns, he has a heart-shaped sweat stain on his shirt. A few moments later, when he bets that the judge will miss the put, the stain is gone. (00:25:30 - 00:26:45)
Audio problem: When Al Czervik pays the band leader to play something hot, they stop playing slow music and a disco song starts up. The disco song is obviously the original studio recording and not the clubhouse band. The female vocal accompaniments from the recording can be heard, but there were no female vocalists with the clubhouse band. (00:36:10)
Factual error: In the very beginning (2nd scene) just after Danny (the Caddy) eats and then jumps down from the backside of his house and hops on his bike to head to work, look in the background behind him and at about the 5th house or so he passes you will see a classic palm tree in the front yard. The movie takes place in Nebraska (which doesn't have any palm trees of course).
Continuity mistake: At the very beginning, when Danny is talking with his dad, in the close-up just after he says, "30 bucks less tips," his spoon is putting sugar in the cereal, but from the back his spoon is in the sugar bowl. Also, the little glass goes from being in front of the dad's hand to behind his hand, in the following shot. (00:02:30)