During the initial battle when the zombies are pouring out of the airplane, rain can be seen on the runway in some shots while in others it is completely dry.
During the raid on the TV station, a zombie whacks a cameraman with a stick so hard that it falls out of his hands. In the next shot, it's back in the zombie's hands again.
When the woman at the TV station has her face scratched by a zombie, her face visibly has blood and scratch marks on it before the zombie touches her.
When Dean enters his his boss's office, two televisions are on and playing. However, when his boss goes to turn off the television nearest him, the other one is off.
Lieutenant Reedman is later referred to as "General".
The hero throws a small TV set at two zombies in the attack on the TV station. The TV explodes violently, with flames and smoke, and all kinds of pyrotechnics. TV sets don't do this.
Although the movie is an Italian movie filmed in Spain, the military officers in dress uniforms are wearing upside down patches on their left sleeve from the U.S. Army's 7th Army Training Command in Germany.
When the helicopter flies over the large crowd of zombies in the park, a dog can be seen playing around with one of the extras.
During the airport attack, a soldier runs up to one of the vampires who hits him in the head and takes his machine gun to use on other soldiers. Just before the soldier gets hit, you can see the fake blood already applied to his forehead before the blow strikes.
When Dean and Laura take refuge in the church and encounter the infected priest, he makes a dramatic turn toward the camera to display his facial wounds to the audience, and then finishes the turn, whereupon Dean and Laura react. But given where the priest's injury is, and given that the priest makes a full 360 degree turn, Dean and Laura would've seen the infection immediately.
When the Channel 5 television station is attacked, a show is interrupted, and the music ceases. The television crew are still wondering what was happening, and do not have time to turn off the music.
In the dance scenes at the TV station they show no more than four female dancers, but if you keep count during the attack, a total of five woman are killed.
The dancer at the TV station who has her breast cut off, already has the latex makeup on her bared breast before she is attacked.
After the people who were trapped on the elevator are released, a zombie can be seen in the background of the dark hallway doing nothing more than panning a flashlight about.
During TV station attack, when the vampire stabs its victim in the breast in the close up shot, behind the woman is a piece of polished metal reflecting various pieces of equipment.
The professor is expected, and Dean is to interview him upon his arrival, which indicates that the news media know about it and have information regarding it. Naturally, this would be corroborated by the airport. However, the professor for some reason arrives on an unmarked, unexpected airplane. A possible explanation for this could be simply 'dream logic', but at the same time it is a fairly major flaw.