Continuity: Rachel is feeding Peter some dessert, he eats a few bites and remarks about how good it is. The camera pulls back and shows a cake perfectly intact.
Continuity: When Peter is talking to his stepbrother in the kitchen, (before he goes to Hawaii) the cereal in the container on top of the refrigerator changes position several times as does the container after Peter talks about Sarah giving it to him.
Continuity: In the first scene with Peter and Sarah, she is seen with a bobby pin but later on the bobby pin in her hair disappears. Before she leaves you can catch a glimpse of it again.
Continuity: When Peter is talking to Chuck at the Surf Board rental stand, he alternates from having a drink in his hand to having no drink visible in the shot.
Revealing mistakes: In the several scenes where Peter and Brian talk over Apple's program called iChat, and the camera focuses on Peter's MacBook, the green light that should be on while the built-in camera is activated is in fact not illuminated.
Continuity: When Peter gets out of Rachel's car after trying to kiss her, Rachel's body is turned in her seat and she is facing him. In the shot where Peter is walking away, she is turned and facing the windshield. When the shot returns to a close-up of her in the car, she is in the same position as when Peter was in the car with her, then she turns to face the windshield and drives away.
Continuity: In a scene at the bar, Peter's drink turns from light pink to dark pink, and back again
Continuity: When Peter is talking to Chuck whilst on the surfboards out at sea, his hair isn't very wet at first, then suddenly is very wet and slicked back - just the same as when he's talking to Aldous in a similar situation later on, showing how those scenes must have been filmed at the same time.
Continuity: During the scene where Peter and Rachel are talking on the cliff, Rachel's shots are shot during a sunny day, while Peter's are when it is overcast. During the shots of Rachel talking, you can see direct sunlight on Peter's left shoulder. During shots of Peter talking, the sky is overcast, and there is no direct sunlight.
Crew or equipment visible: When Rachel is in the water telling Peter to jump off the cliff, her blue lifebelt is visible under and above the water as she bobs around.
Continuity: (Around 57:30) When Matthew the waiter is doing his English accent when giving his demo to Aldous Snow, Aldous' shirt collar corner alternates between pointing towards his chest and away from his chest. Also the yellow beads and red beads on his necklace alternate positions between shots.
Continuity: When Peter is checking into the luxury hotel and standing behind the newlyweds, the bride's arm alternates between being wrapped around her husband's waist and around his neck, cupping his ear.
Continuity: When Aldous Snow is leaving the hotel, his female driver can be seen in the background walking to the car twice.
Continuity: When they tell Peter he needs to get out of the suite, he first puts the sheet over his naked body. Towards the end, the sheet is off again.
Continuity: In the scene where Peter meets Kemo on the beach and is given a beer, when the camera is facing Peter from behind Kemo, the bar towel is missing from Kemo's left shoulder. But when the camera is facing Kemo and behind Peter, it is there again. There are a 4-5 alternating shots to notice this mistake.
Continuity: When Pete is talking to the buffet guy, the hostess towel disappears from his shoulder and then a few seconds later reappears again.