Continuity mistake: When Jude Law and Joseph Fiennes are walking through the Soviet Headquarters and talking about how the sniper never relocates, in the first scenes, Jude Law has no bandage on his wound on his head, however in the later close up shot there is a bandage, this within a few minutes. There definitely is no bandage present in the first scenes. (00:45:20)
Continuity mistake: During Danilov's escape sequence, there is a rollover of a vehicle. While the vehicle's wheels are still turning, the tyre tread is of a modern all-season radial. When you see the vehicle again, it is a tyre more fitting for the time period. (00:14:55)
Continuity mistake: When the boats come under attack from the Germans, we see a senior officer with a red band round his hat get shot and fall back into all the troops. A few seconds later, the same man is seen firing at the planes. Camera does another double cut, and gets shot again. This is not a filming technique to show the same shot from different angles as we see him shooting back after being killed the first time. (00:08:30)
Factual error: Sometime in the movie somebody (I think the boy) says the Nagant rifle that Jude Law uses has a 4 times magnifying scope. When you compare the distance that objects have in the movie without scoping and through the scope of the rifle the magnification is way bigger than just four times. I know that cause I own a 4x scope myself.