Corrected entry: At the beginning of a movie on the parking lot, we see Columbus fleeing by car from two zombies. When third zombie emerges on a back seat, Columbus crashes the car in an attempt to get rid of him. The size of a hole in the glass changes in shots, which kind of explains why the thrown zombie couldn't reach back into the car through the hole in the glass he just made by his own body.
Corrected entry: In the opening narration, Columbus says that the zombie virus derived from the virus that causes Mad Cow disease. The problem is, Mad Cow disease is caused by prions (pathogenic, misfolded proteins), not viruses. It can't really count as a character mistake because his narration is used to deliver exposition outside of the main story.
Corrected entry: In the opening scenes, when Columbus is telling his rules and is shown been chased by two zombies, he runs to his car, drops his keys and continues running (I.E. Cardio). He comes back to his car and opens the door, then drives off and a zombie who was quietly lying down in the back seat attacks him. This is obviously added for shock value, as we see no car damage to show the zombie forced its way in and since zombies are full of rage, we are expected to believe it could calmly sit and wait for the driver.
Corrected entry: The electricity seems to be working in many of the places shown in the movie, despite the fact that two months have passed since Z day. For example, in the first scene the lights in the gas station car park are all blazing. Surely by this point the grid would have stopped working and any emergency generators would have run out of fuel.
Corrected entry: When Witchita and Little Rock are on the "Swinging Ship" ride at Pacific Playland, how exactly did they start the ride once they were on it? Even if they rigged it, how in the world did they stop it to get off? These types of rides require an operator at the controls to start and stop the ride.
Corrected entry: In the very first scene, when the camera turns around, for a brief second, a shot of a roundabout is visible with a sign pointing left, if in America the sign would be pointing right.
Corrected entry: Bill Murray says that he still golfs - in fact he just played nine holes at Riviera. It has apparently been two months since the zombies took over America. A golf course - especially a professional quality one such as Riviera - would become difficult to play (particularly to putt) after only a few days without the grass being cut and watered. After a couple weeks or so it would be unplayable as all the grass everywhere would be either dead from lack of water or several inches long.