Continuity: After Pedro puts the cake down it moves closer to Summer's door and slides across her doorstep. The envelope under it also disappears and reappears.

Continuity: At the end of the movie when Napoleon is dancing for Pedro's campaign, you can see his boots have mud on them sometimes and sometimes they're clean.

Continuity: When the camera shows the table of egg food, several flies are crawling around the sandwiches. It is highly unlikely that either the flies all at once left their meal in the short time before Napoleon moves to grab a sandwich, but we see no flies fly away when he does so.

Continuity: When Rex announces that his program costs, "Only $300," Kip's hands go from being on the ground to in his lap.

Continuity: When Napoleon arrives at Pedro's house just after he has cut his hair and is sitting on the lawn, his bike is upside-down with the reflector in the shot. When the camera comes back to Pedro, the bike reflector has moved out of the shot.

Continuity: When Uncle Rico takes out the ship from the box, the box is near the woman's arm. In the next shot, when she tells her husband "I want that" the box is nowhere to be seen.

Other: In the scene where Napoleon finds Tricia's picture in the yearbook, the person to Tricia's left is named Stephanie Stevens, however the picture to her left is obviously of a male. Also, the row of pictures above Tricia includes Matthew Smith, whose picture is of a female, and Taresa Sorenson, whose picture appears to be rather masculine.

Continuity: When Napoleon is calling Kip, the position of the phone on the table changes between shots.

Continuity: When Napoleon is about to have lunch at the egg farm, one egg is standing out on the top of the bowl, a second later there are more eggs.

Continuity: When Deb shoves the box of keychains into Napoleon's arm, between shots the green keychain on the far right disappears.

Continuity: When Grandma is motorcycling at the dunes, the lines in the sand change dramatically between shots.

Continuity: When Napoleon is waiting for Uncle Rico, he checks his watch and it says Thursday, July 17. This movie is set during the 2004-2005 school year, as seen on Napoleon's lunch card at the beginning. July 17 was on a Saturday in 2004 and on a Sunday in 2005, not Thursday.

Continuity: Napoleon is drawing lines from the back of the unicorn in class. When the teacher calls him up, it flashes to his notebook and the drawing but no lines on the rear of the unicorn.

Deliberate "mistake": In the scene where Napoleon asks the school secretary if he can borrow the phone, she pushes the phone toward him but in the shot of Napoleon you can see the phone never actually moved from before he asks to borrow it to the time he makes the call. This is only seen on the full-screen version of the film. The phone is not visible on the wide-screen version because the clip the bottom portion of the image when they made the wide-screen version.

Continuity: The first time that Napoleon is seen walking out of his house to feed Tina, the front steps are in bright sunlight. When he returns a moment later, and Kip is lacing his rollerblades, the steps are covered in shade from a nearby tree.

Continuity: When Pedro is sitting at the table in the cafeteria, Napoleon comes to sit down, and Pedros's arm changes position from shot to shot.

Continuity: When Deb gives Napoleon the picture of the girl, the position of the picture in Napoleon's hand changes between shots.

Continuity: When Uncle Rico goes alone to see Deb at her studio, she's trying to decide what backdrop to use. Her hands are together and under her chin. She turns to Uncle Rico and drops her hands, but in the next shot they're up again. Then Uncle Rico's gold chain is visible, but not visible in the next shot.

Revealing: When Deb is taking Uncle Rico's picture for the an ID badge, you can tell that the camera on the tripod is a prop as you can see right through the lens to the clothing hanging up on the clothes rack behind the camera, specifically the red dress/shirt.

Continuity: When Pedro returns to school after being sick, Napoleon sits next to him in the cafeteria. There is a piece of food on the table next to Pedro's lunch tray, and in the next shot it's gone.