Lois is in the car. Headlights are visible behind her but as the camera angle changes there are no other cars on the road.
In the closing scene, Hal has picked up Francis as he makes his way back to military school. Headlights are visible behind them the whole time, but as the camera angle changes there are no other cars on the road.
When Malcolm tells Stevie about Francis's escape, the drink in Stevie's bottle changes between shots dependent upon camera.
When Malcolm tells Stevie about Francis's escape, Stevie takes a sandwich from the box. The remaining sandwiches position in the box change position between shots.
The amount of chicken in the serving dish on the table changes when family is at dinner.
When Reese tells Hal that no one believes he beat the last level in Mortal Kombat, and Hal says, "Because that's just ridiculous. No one beats Sub-Zero." In the last level of Mortal Kombat, Shang Tsung is the last person to beat.
Francis hides in the creek behind the house. Malcolm finds Francis after a considerable walk from their property. However, when Francis howls, Dewey throws rocks and hits Francis as though he was immediately behind the fence.