When the plumber "Joe" is in the basement, he starts to chisel out part of the wall right about forehead level. The next shot "Joe" is crawling into the large hole that he has made but has to duck really low to get through the space.
In the Italian version, the clerk working for the city archives says the file Martin needs is M-13020. When Martin is looking for it, he says: "Here were are, M-13012.
A man and a woman are seen talking as they walk toward the camera in the French Quarter; shop signs are visible as they face the camera. The camera cuts to show them walking across the camera view and they are shown walking on a sidewalk with gates in a residential area. The camera cuts back to them walking toward the camera and they are again in the French Quarter passing shops.
When the possessed Jill gets shot in the face, her forehead blows up. But whenever other zombies get shot in the head, they just leave a simple bullet wound.
When Martha's face is being grabbed, she is only grabbed on he lower half, and her eyes aren't covered. But in POV shots, her eyes are partially covered.
when the architect falls in the library, the spiders that crawl on him are making chirping noises like canaries, while his face changes rapidly back and forth from a real, blood-covered actor to an obvious fake modeled head.
Sign outside the morgue reads "Do Not Entry".
When the corpse of the artist is in the autopsy room you can clearly see it blink.
When David Warbeck's character begins loading his revolver, just before the elevator door closes he can be seen trying to stuff a cartridge down the barrel with the bullet facing down. Catriona MacColl looks at what he's doing and begins to grin just as the shot cuts.
Dead man rises from a bathtub, his face is rotten, but rest of his body isn't.
When the corpse is clawing open the autopsy bag in the hospital he blinks his eyes.
When Warbeck and MacColl enters the elevator at the hospital when they are escaping from the zombies Warbeck starts to reload his gun. Just before the elevator doors close we can clearly see that he put the bullets down the gun barrel as a joke and both him and MacColl starts to laugh.
John fires nine shots from his Colt .357 Python revolver before it is empty. This pistol only holds six rounds.
When Liza and John are in the basement of the hotel after the zombie shoot out, Liza says "We're under the hotel." and "What's happening? Why are we here?". On both occasions, her mouth doesn't move at all.
This movie is set in the basement of a house in New Orleans, Louisiana. However, New Orleans is below sea level and no houses there have basements.
When the corpse of the artist is in the autopsy room, the assistant says, "He's in amazingly good shape for a corpse that's supposedly been dead for six years," when he should have said sixty years.
Emily states that Schweick was killed in his room. He was first attacked in his room but then carried down to the basement and actually killed there.