Other mistake: When Balian talks to God on the hill where Jesus died, after he says his line, the next shot is him sitting down overlooking the empty valley below. A white light travels from right to left going 45-50 mph. Nothing back then could go that fast, and even if anything could, a torch is yellow and red, and even if it could be white, no rider can ride that fast with a white-light torch and keep it from going out - leaving us to assume it's a car.
Other mistake: When the USA soccer world cup team is practicing in New York, on some field in Long Island, in several shots you can see the steeple for Union Avenue Christian Church, which is actually located in Saint Louis, Missouri.