Continuity: When Uncle Buck and Tia are talking in the car after Uncle Buck kidnapped Bug, the first 5-6 shots show a red box and some envelopes near the windshield. In the next shot there are two envelopes near the windshield, no red box.

Continuity: The scene where the elementary school teacher asks his kid what they did that week. After he asks that question and Maizy raises her hand, look at the desk belonging to the girl in the row next to Maizy. It has crayons and other supplies on it. After the teacher calls Maizy's name, the shot goes back to her, showing the girl in the next row's desk completely empty.

Continuity: When Uncle Buck takes the kids to school for the first time and the car backfires, the kid who has his cap blown off, you can clearly see that his face is black with smoke before the car backfires.

Continuity: At the beginning of the bowling alley scene, Uncle Buck rolls a ball in unison with a man on the next lane. The ball knocks over all the pins, but when they cut back to Buck celebrating his strike, the man next to him is rolling another ball already.

Factual error: When Buck kidnaps Tia's boyfriend "Bug" and puts him in the trunk of his car there is no way Bug could have survived because the automobile emissions and the gag in his mouth would have suffocated him.

Continuity: Buck comes out of the laundry room twice when Marcy comes over and thinks that Buck is hurting Cindy.

Continuity: In the scene where the dad tells the mom that Buck will be able to stay with the kids, the moms arms go from uncrossed to crossed in a flash.

Continuity: In the scene where Buck hits golf balls at Bug, look closely at the golf club that Buck pulls out of the car. It is a wood for left-handed players - yet Buck hits the ball righty.

Continuity: When Buck first takes the kids to school and drops of Tia the engine backfires and shoots oil/smoke in a boy's face. In the next shot no one is behind the car.

Continuity: When Uncle Buck gives up waiting for Tia at school and starts his car, thick smoke billows up continuously next to his window. The camera angle changes immediately and then smoke is only seen well behind the rear bumper.

Continuity: When Buck is doing laundry, he takes a plate of clothes out of the oven and sits it in front of him. After the shot of him burning himself, the plate has disappeared.