Continuity mistake: When we see the police officer checking the hit counter on an adult web site, the hit counter goes down from 1,739,986 to 1,739,944 a few seconds later.
Continuity mistake: When Profion approaches the wheel with the sword, the wheel is almost stopped with the white blob on the right. Shot changes to the wheel totally motion less and the blob is on the left.
Other mistake: Mr. Gellar never ages. We see a flashback of him when he kills Sarah's Dad when Sarah was a little girl. When Sarah is a detective, he still looks the same.
Other mistake: The wet nurse that cares for the newborn Titus is pregnant when she is hired. She is far enough along to be producing milk, yet doesn't give birth until Titus is a year old.
Visible crew/equipment: In many of the fight sequences, wires are visible on the actors when performing high jump kicks and/or acrobatics, for example, the first time the main character encounters zombies in hand to hand combat, a rope harness can be seen pulling the zombie back towards the tree.