Continuity mistake: When Ben, Tom and Judy are trying to escape from the zombies in the truck, it is dark, but when the zombies are giving chase, dawn is breaking, and when the truck gets to the gas pump it is now dark once more. This is just one of a number of scenes in this film that change from darkness to daylight and vice-versa.
Continuity mistake: While Ben is trying to escape with Tom and Judy, he is holding a table leg that is being used as a burning torch, just before he gets into the back of the truck, the torch is nearly going out, but when he gets into the back of the truck, the torch is burning brightly.
Continuity mistake: Again, from the opening graveyard segment. As the first zombie approaches Johnny and Barbara, his position and distance from them changes inconsistently with the actual passage of time. Although he is incredibly slow moving, he manages to move about 30 yards in 4 seconds. He is about 25-30 yards away in one shot, and 4 seconds later he is coming up to Barbara and grabs her.
Continuity mistake: There is a scene where Ben fires the rifle through the window at one of the zombies for the first time. Just before he fires the first shot Tom is standing to the left of Ben. Just after he he fires the shot, Cooper has suddenly appeared and is standing to the right of Ben.
Continuity mistake: Just after Mrs Cooper has come up from the cellar for the first time, Tom says to her "I gotta go help Ben with the television." Her arms are lowered by her side, but when the next shot cuts in, where Mr Cooper is in the foreground, her arms are now raised up to her chest.
Continuity mistake: In the scene where Ben is dragging the body out of the house to be burned, he is seen on the porch lighting the zombie on fire. The shot changes to show two zombies coming towards him, but when the shot goes back to Ben he is now off the porch about 5 to 7 feet with the corpse blazing in front of him.
Continuity mistake: Throughout the night scenes outside, patches of the terrain out in the middle of nowhere are mysteriously illuminated so we can see the zombies. Where is this light coming from? There are no street lights, no nearby houses, no car headlights, and the moon would not cast light in the shape of conveniently located spot light patterns where the zombies just happen to be walking or laying dead.
Continuity mistake: During Barbra's speech after Ben removes the legs from the dining table, he moves the table top and rests it against a window. When he tells Barbra to "keep calm" the table top disappears. After getting the hammer and telling her to "calm down" the table top reappears.
Continuity mistake: When they are throwing the molotov cocktails out the window to let them get to the car, they throw one in front of both sides of the vehicle. However when the 3rd and 4th cocktails land, the first two which were just burning are now gone and there's no burn marks on the ground.