Other mistake: There is scene in which the assassin is mocking the young would-be suicide bomber and his friend for eating with knives and forks whilst he eats using his hand to pick up the food. However, he eats with his left hand which is absolutely forbidden under Islam. All Muslims eat with their right hands unless they are unable to eat with it (for example if they have a broken arm).
Continuity mistake: Ewan begins to chase Ash out of the kitchen and through a corridor. Ash tips over a pile of stacked chairs which fall and block the width of the corridor, but could easily be climbed/jumped over. However, Ewan paces the length of the corridor as if the chairs are not there.
Revealing mistake: Ewan asks Mark to look at the newspaper article about the graduate who was killed. Other than the leading paragraph written in bold text, and the word 'tragedy', the other words relate to an article about the affects of global warming on great white sharks. The text is also duplicated three times.