Continuity mistake: When Danilov first shows Vassili the leaflets that praise his exploits, the shot shows a leaflet coming off the printing press with four "x-ed out helmets", indicating how many German soldiers Vassili has killed. The camera follows the leaflet off the press, Danilov picks up the leaflet and hands it Vassili. The next shot shows Vassili looking at the leaflet, but now there are five x-ed out helmets.
Continuity mistake: When Vassili is behind the chemical factory waiting for the Major to appear, the soldiers run out from under the train cars. The next shot shows the soldiers from behind, and if you look closely a horrible editing mistake was made. Some of the soldiers suddenly disappear, and then reappear.
Continuity mistake: During the scene where Vassili is hiding from Major König behind an old oven and trying to get his gun back by tossing his pocket knife at it and pulling the string, König shoots the string. The string breaks, but the bullet doesn't hit anything behind the string, as if it was stopped by the string!
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.
Continuity mistake: When Vassili and his two friends go out to trap König by shooting telephone repairmen, their rifles are covered by hessian, when they are shooting the repairman the guns are uncovered, and when Koulikov and Vassili are on the way back and jump across the gap in the buildings their rifles are covered again.
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.