Just after Tony is hit by the car he is in the street. As the car pulls away he in on the sidewalk. When the store owner comes out he is back in the street.
After Tony is hit by the car and is brought home, he is wearing completely different clothes than he was before he was hit by the car.
After Suzie gets out of the hot tub, her pants become dry instantly.
After Suzie and Peter finish their tennis match, as Suzie walks across the court to Peter, her hair gets messier between shots.
A tennis ball disappears from the floor during the tennis game.
While Susie is running from the zombie through the sports club, she runs past several clearly marked emergency exits.
The opening sequence is set in the 1950s, but there are modern school buses, cars, TV aerials, traffic signs, clothes, house architecture and style.
When Capt. Tom Churchman gets attacked by a zombie and gets pulled into the hole into the ground by the tombstone, a red light is shining out of the hole and when the zombie and Tom go into the ground you see the outline of the circular lamp that is used to give off the red light as the fog is coming out of the hole.
When the zombified Tony chases Susie through the supposedly empty health club, crew members can be standing at the left side of the screen.
Though the film is set in the U.S., much seen in the film gives away the fact that it was filmed in Montreal, Canada. All commercial products seen are virtually exclusively Canadian (Molson, Labatt and O'Keefe beer, Players cigarettes etc.), Quebec road signs (Arrêt/Stop signs, etc.), the reveresed bilingual "Park Harpell" (instead of Harpell Park) and many more.
The store owner with the heavy Italian accent is called Peters. This seems to be very odd.