When character Vix makes her first appearance in the film she uses her sword to slice and dice a number of zombies but her sword had not a drop of blood on it and is extremely clean.
For the largest scene of the movie, which was the largest filming of over 500 Zombies and another 500 motorcyclists and a helicopter, there was a huge mistake made. None of the many cameras were white-balanced and it cost a great deal of time to color-correct the many cameras that shot the downtown fight scene. That scene was the culminating point of having over 1,000 actors fighting one another (in the film) and making history in Zombie movie history. The Canon GL1 and GL2 cameras manually had to be white-balanced and did not do it automatically. This was never a problem on all other locations, but the excitement of being at this location and having such a large cast and crew just made the videographers forget to check their equipment that day.