Continuity mistake: In the bootcamp scene where Captain Sobel is yelling at Private Christenson for drinking from his canteen, you see a machine gun resting on Christenson's right shoulder. When the camera angle changes to behind Christenson, the machine gun has suddenly moved onto his other shoulder. This happens quite a few times in this particular scene.
Continuity mistake: In part 5 when Easy company surprises the two sleeping German companies, with Winters leading the charge. Winters crosses the berm and a sleeping German stands up, and gets shot. Winters then shoots off 9 more rounds (2 too many), then reloads, drops to one knee and only shoots 6 rounds (2 too few), and in both cases the clip ejects as if it were a normal 8 round firing sequence.
Continuity mistake: When Cpt. Nixon is running out of booze while he is playing poker with some other officers he is going out to take a walk. After a while he stops in front of a shop window and smashes a petrol can from a nearby jeep through the glass. There is a big hole in the window but not big enough for him to get through. Two shots later there is no glass at all in the shop window even though he never had the time to remove the rest of it.
Continuity mistake: In one scene, the barn-like structure ‘petit restaurant' has the words 'hotel' on the left and 'cafe' on the right, but the building gets a grenade to the upper floor to clear the two snipers pinning down Easy Company. After the retreat, the Germans march past and the Hotel/Cafe is fully restored and the window is back in place.