After Jimmy (a.k.a. "The Last Martyr") dies, it can be seen through the windows on the inside of the prison that the morning daylight turned to darkness because the Sixth Seal was broken. But when they are wheeling Abby from the door to the prison to the ambulance, you can clearly see daylight when it is supposed to be dark out. Then on the inside of the ambulance, it is dark again.
During the scene at the gas chamber, they call for a doctor but there are none available. At every execution there is a doctor to confirm time of death.
The Hebrew word "guf" is mispronounced to rhyme with "fluff." Its actual pronunciation is closer to "goof."
Israeli Defense Force armored vehicles and trucks are not marked with a solid blue Star-of-David, as portrayed at the beginning of the movie; this shape is the emblem of the Israeli Air Force. Furthermore, IDF ambulances are marked with a red Star-of-David rather than a Red Cross, as depicted at the same scene.
Abby reads an excerpt from a book saying that gufs are "part of Judeo-Christian mythology." In reality, gufs only belong to Jewish mythology. There is nothing about gufs in Christianity. When Abby reads from John's Revelation that before the breaking of the Seventh Seal, Heaven was empty of gufs -- that passage also does not exist.
When Abby visits the old rabbi's apartment, the mezuzah on his doorframe is tilted the wrong way. (It should be tilted top-inward.) Avi's (the fellow across the hall) is also placed incorrectly, as it is straight up and down, and should also be tilted inward.
At the end the earthquake starts in the execution room of the prison. It's also seen in the hospital, at least a half hour later. Earthquakes rarely last more than a minute. However, it's not clear this was a continuous quake; the hospital quake could have been an aftershock. In addition, it *is* the end of the world; the seismic phenomena could have been something previously unknown.
When Russell Quinn is holding his newborn son, you can clearly see an actor supposedly "dead" on the table behind him breathing and moving their mouth.
As one of the signs, heavy hail is falling. An interior view of car shows its windscreen breaking from it. Yet when it's over, outside shots of cars show neither dents nor bruises on the bodywork.
David's papers are written in Hebrew, but have Indo-Arabic numerals which came into use towards the end of the first millennium CE. They would not be found on any document from the time of Christ or earlier.
In the overhead shot of Abbey running into the synagogue following David, the shadow of the camera, operator, and dolly are visible tracking on the ground in front of her.