Revealing mistake: Near the end when Ace gets into his Cadillac, in the first shot facing the front of the car, there is a protective glass in front of Ace (the same width as the windshield) with the dashboard in between that glass and the windshield. Note the vertical edge of the glass is visible at the right side, and the rearview mirror's sticker on the windshield casts a shadow onto the second glass. During the stunt, the flames on the dashboard are between the glass shield and the windshield, keeping the actor safe from harm. (02:46:05)
Visible crew/equipment: Just after Lovell secures the hatch for LM jettison, and Swigert states "Okay, pyro batts look good, I don't think we're gonna have to tie those other batteries," there is a visible bearded crew member wearing glasses and a hoodie on the lower right hand side of the screen. This is only visible in the fullscreen version. (02:01:00)
Visible crew/equipment: Near the end of the movie when the convoy is heading back to the Pakistan Stadium, a Humvee stops briefly to allow a man to walk across the street with a child in his arms. When the shot changes and the Humvee begins driving again, a crew member or cameraman is seen inside the Humvee wearing a white shirt. All of the men who entered the Humvee were wearing fatigues. (02:05:27)
Revealing mistake: When the 54th Mass. marches past a liberated plantation some black children wave them on. One of them is wearing a digital wristwatch.
Revealing mistake: When Ajax slams the hammer end of his spear into a man, he has his shield at his back. The top arrow in the shield is bent at a 90° angle and as Ajax moves the top (plastic) arrow droops down and the bottom arrow actually flops around. While still in the same location, when he sticks his spear into the sand and pulls the arrow out of his thigh, the arrows on his shield are gone. (00:42:20)
Continuity mistake: In the scene where the three Confederate soldiers are about to be executed for desertion, a blindfold is placed around the deserter on the right. It is a narrow strip of cloth covering his eyes. The camera pans to the firing squad and then back to the three men. The blindfold on the deserter on the right, is now much wider.
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.
Factual error: After the successful Trinity test in 1945, people in a crowd are holding small US flags with 50 stars on them (offset rows). At the time there were only 48 states and the flag had 48 stars in even rows. The 50 star flag didn't exist until 1960, after Alaska and Hawaii were made states in 1959.
Visible crew/equipment: When the Muslim armies approach Brendan Gleason's castle there is a side shot of the Muslims army coming to a halt. You can see the marker stake with yellow tape at the top (used during production as a mark). (01:10:10)
Continuity mistake: After the 2nd battle (when Joan got an arrow in the chest) she wakes up her soldiers the next morning and uses the tower to break down the English bridge. At the bottom of the bridge when its falling (inside the fort), no one is near the bridge when it's falling except the guy who bad-mouthed Joan earlier that morning. Then in another shot there are at least eight guys getting crushed by the bridge.
Continuity mistake: During the ambush on the river two Indian braves can be seen firing arrows one gets shot and dies but the brave who is left his hair and clothing are wet. The scene cuts away and when it cuts back to this brave he stands up only to get shot in the heart. He clutches his heart with both hands and then dies by falling into the river but now his clothes and hair are completely dry. It's clear that the earlier part was a retake after he fell in the river.