Revealing mistake: In the scene where the medic gets shot, watch the shot where Upham brings the bags up to the injured medic. The next shot there is some fog which then reveals the injured medic. In this shot, watch carefully as the cast rips away the medic's shirt. If you look near the neck, you can see the fake stomach vest he is wearing for a split second - when the actor realizes he ripped too far up, he quickly covers it back up.
Continuity mistake: When Miller is collecting Upham from the group of translators and map readers, Upham is so confused and clumsy that he knocks everything off the table onto the floor (e.g. typewriter and helmets). Told by Miller to leave everything except his helmet, Upham picks up a German one by mistake. When sent back to the table to get his own, everything has miraculously jumped off the floor back onto the table.
Revealing mistake: In the opening sequence Cpt Miller is wading through the sea with another man. You can see an odd looking square-shaped object clearly through his wet uniform. It may come as no surprise that a second later he is shot dead centre of the pocket. The object was obviously a charge.
Revealing mistake: Just before the two American soldiers slap their grease coated "sticky bombs" on the passing German Tiger tank, you can clearly see two identically shaped grease stains on the first two wheels. Presumably nobody remembered to wipe off the wheels of the tank after a rehearsal or previous take of the scene.
Revealing mistake: In the scene where the American soldiers are in the village listening to the French music on the record player, take a look at the stone pillars at either side of the doorway. The bullet patterns are all the same on each stone block. No doubt the same mould was used.
Continuity mistake: When Jackson has been given the dog tags to search through he looks for a place to sit. In this scene you see a black box with two yellow boxes at either side in the background. In the next scene the yellow box on the left has magically jumped up onto the black box in order for Jackson to kick it off and sit on it.
Revealing mistake: In the Omaha Beach fight when the soldiers are ordered to gather more weapons and ammo, there is a massive explosion shortly after - if you look closely you can see the wires used to pull the unfortunate victims into the air.
Continuity mistake: At the end when Tom Hanks has just died, there is a distant shot of Ryan standing there in disbelief. By Tom Hanks left leg is a helmet, upside down. The next shot is from above and the helmet has flipped over.
Continuity mistake: When Miller first hits the sand at Omaha a mortar round blows up behind him. He kneels in the sand, his face covered with bloody water. Seconds later a young soldier shouts at him and suddenly Miller is chest deep in the water with a clean face. Also his helmet liner strap changes position across the visor of his helmet.
Continuity mistake: In the scene when they defend the bridge in Ramelle there is a soldier who wants to attach a stick-bomb at a German tank. When he walks out to the tank you see that he is wearing a beige uniform. In the next shot you see that the uniform has changed into a dark green, and you also see that it is a puppet that explodes.
Continuity mistake: In the final battle in the French Village, the Americans are attacked by two Tiger tanks, two Panzer tanks, etc. The Americans use a sticky bomb to turn the first Tiger into a roadblock. If you look at the roadwheels of the tank when the troops are attaching the sticky bombs, you can see that one of them has a large chunk of rubber missing. Later on, when Capt. Miller is staring down the second Tiger as it crosses the bridge, you can see that it too has a large chunk of rubber missing from the same roadwheel - same tank.
Continuity mistake: During the beach scene, Miller is kneeling at the rear of a Belgian fence talking about the beach being pre-sighted. There is a soldier in front of the fence who gets shot three or four times. If you look the first scene, he gets shot in the upper leg area, then when Miller moves out from behind the obstacle, the bullet wound has magically disappeared.