Corrected entry: After the prison ship crashes the search team come along and find the pilot alive, but the Angel family already checked the wreckage for survivors so there shouldn't be anyone there.
Corrected entry: The central computer explains that the DNA is imprinted onto the bullets by direct skin contact. However, all judges use long-sleeve uniforms and gloves, so there is no skin-gun contact.
Corrected entry: While introducing his family to Dredd, Pa Angel sets Mean machine to level 1 by twisting his dial to the west position, however a few shots later Mean's dial is set to 2 (north) and Pa then sets him to level 3 (east) as Dredd escapes from his bindings. No-one is seen to switch mean from level 1 to level 2 in the interim.
Corrected entry: In the final scene inside the statue of liberty Judge Dredd risks his life to prevent Rico from unleashing his clone army. No where in the movie does it mention how the cloned soldiers would spawn with combat training, loyalty to Rico or even the ability to speak English. Rico would create a bunch of naked, confused, illiterate men.
Corrected entry: About the DNA: They said what had turned Rico from a perfect lawman to a criminal was a mutation. But if there has been a mutation in one out of two twins, their respective DNA will not be the same. Thus, Rico would not have been able to use the judge-weapon, nor would Central have registered Dredd's DNA-code on the bullets that killed the reporter. It would have registered Rico's.
Corrected entry: In the firefight in the alley early on, Stallone stands in the middle of the street, claiming that the weapons cannot hurt him because he is outside the lethal range. Perhaps, but the fact that the guns are aimed down will extend their range, and the fact that they're not lethal doesn't mean they can't do significant damage.
Corrected entry: They can tell which judge has shot somebody, because the persons DNA-code is printed into the bullet just before it is fired. That's how they frame Judge Dredd. They give his gun to a guy who supposedly is his "Genetic twin". They then claim that they have the exact same DNA. If they have the same DNA... How come they don't look exactly the same. In fact they don't look alike at all.