
Factual error: Why is Hilts not wearing a uniform? A serving officer captured behind enemy lines in civilian clothing risked being shot as a spy. If a prisoner's uniform was too worn or damaged to wear, it was routine for the German authorities to replace it - a P.O.W. in civilian clothes is an obvious escape risk. He is wearing a pair of tan chinos, a cut off sloppy Joe sweatshirt, both ridiculously anachronistic - Sixties hipster fashions - and nowhere even close to a World War 2 uniform. He is also wearing Army Type III Service boots - something that would never have been issued to a fighter pilot.
Suggested correction: Hilts was a POW for a few years before being transferred to this camp. His current clothing likely changed from when he was originally captured in his uniform, so he would not have been considered a spy. After multiple escape attempts, his uniform could have been ruined. The Geneva Convention required that POWs receive shelter, food, clothing, medical care, etc. The Red Cross delivered care packages to POW camps containing food, miscellaneous apparel, and other essentials. Sweatshirts have existed since the 1920s and changed little. Also, chino pants have been around since the late 19th century. Hilts was an U.S. Air Force pilot, and light-colored khaki trousers (similar to chinos) were standard-issue uniform for some U.S. military branches, along with leather bomber jackets for Air Force pilots.
And none of them would have been available to a prisoner in a German POW camp in Poland in the mid 1940s. Not one single item of hipster fashion would have found its way into the camp. Even if it did, do you really think the German authorities would allow a prisoner to lounge about in civilian clothing? Talk about an escape risk.
The camp was in Germany, not Poland. Other than the sweatshirt, Hilts appears to wear military clothing - a leather bomber's jacket with military sleeve insignia, and U.S. Air Force khaki trousers. So not "hipster" '60s civilian clothing. The sweatshirt could be military appropriate (even issued) and something Hilts acquired at a different camp. He arrived with a small duffel bag that presumably had some misc clothing. He and two other POWs are the only Americans and have different uniforms. The current camp commandant, who apparently disdained Hitler and his Nazi minions, would decide what POWs could wear.

Continuity mistake: A blond boy in a light brown shirt is attacked by a crow and goes from having no blood on his neck to having a lot of blood smeared on his neck between shots. (01:14:10)

Visible crew/equipment: When James Bond shoots down the helicopter, then it crashes. He emerges from the rocks to run from the crash site to the right of the picture, just as you see Sean Connery emerge from behind rocks from the right in the same scene. So, for about a second, there are two James Bonds in the picture. One is the stuntman, and the other is Sean Connery. (01:38:05)

Other mistake: Take a look at the size of the rock that the boys push onto Piggy. A rock of that size, falling from that height would've exploded Piggy's head like a ripe melon. It also would've crushed his body into a mangled heap.

Continuity mistake: Paul Newman and the Count are in the car heading to the rehearsals. When they are about to arrive, the background behind the Count shows a pier, but when the angle changes the background behind Newman shows the car surrounded by buildings.

Continuity mistake: When James Coburn is about to leave the phone booth where he's been lighting matches, the number of matches he leaves on the top of the phone changes between shots.

Continuity mistake: When Theo and Eleanor decide to explore the house, before the arrival of Luke and Dr Markway, they are in one of the dark corridors of the house. When Eleanor speaks the leaves of a plant shake, close to her right shoulder, but Eleanor is standing perfectly still, touching the right hand side of her chin with her right hand. Eleanor then hears a gasp, and we hear her thinking. In the next shot of Theo, Eleanor, now in the background, has moved a meter or two away from the plant, she is more to the centre of the archway. The next shot shows Eleanor standing next to the plant again.