When the tricycle is moving along the road (at around 1h 14 mins), the picture flips and the bell and lone handlebar grip streamer move from the left-hand side to the right-hand side and then back again.

When the boy rides his bike, he is wearing long socks at first, but in a later scene those change to short socks.

The chess board is the wrong way round (it has a black square at bottom right, and it should be white)

In the end credits, payroll company is spelled incorrectly - Compagny.

When the tire is watching Nascar on the TV, the sound we hear is from a different series of motor-racing; possibly Formula 1.

When Chad, the sheriff, is addressing the crowd at the start of the movie, you can see the reflection of the production crew in the glass of water he is holding.