The car tags are the same color even after many years Caesar is born. Three years after and then five years, the car tags are still yellow.

Boston Redsox stadium did not look like that when Billy visited it in the movie. Fenway Park has gone through multiple renovations since then. The most obvious errors included the concessions section he enters Fenway through was newly renovated since '02, the first shot of Fenway includes the '04 & '07 banners, and a later shot included the wall with the monster seats, which did not yet exist.

Throughout the film, Atom's shadow function switches back and forth between mirror and mimic for no apparent reason or command from Charlie or Max.

In the scene at the riverside cafe, a tugboat slowly pushing a long string of barges is seen in the background. In subsequent shots looking in the direction of travel, the tugboat and barges have disappeared but there was not enough time for them to have traveled out of view.

When Jay and Si are fighting an extra in a red shirt walks past the quad bikes. Camera cuts and he walks past again.

As Ethan and Benji go through the Kremlin Benji isn't wearing glasses, but a cut later he's wearing them.

At the gas station scene when the Sheriff enters the building, the attendant is listing to a Walkman. The Sony Walkman wasn't released in the the U.S. till the following year (1980) and he wasn't reading Japanese instructions.

Position of hat changes when Watson wakes up at his wedding.

The name of the school that Cameron Diaz works at is called John Adams Middle School but after Cameron Diaz meets the zany teacher next door, the next scene shows the outside of the school with a sign that says "Lincoln Middle School" instead.

When Jake is being hit in the face, he has blood on the right half of his face by his mouth. Quite a lot running from his nose to his chin actually. The next scene he is on the ground and no blood is by his mouth.