Continuity mistake: In the scene where the English on horseback charge the Scots, look at the lighting on the ground. One moment it appears to be sunny, and the next it is cloudy.
Continuity mistake: At the very end of the movie, watch the man standing to the left of the Bruce at Banickburn. In a shot from behind, there is a man with very short and curly hair. In the very next shot, from the front this time, a different man with very long and straight hair is to Robert's left.
Continuity mistake: When William realizes that the Bruce has been bought by the King, he gives up and lies on the ground. Earlier, he had been hit with an arrow and if you look hard you can see the arrow move when he lies down. This shows the arrow to be attached to his clothing and not actually piercing his body.
Continuity mistake: During the scene in which Steven (the crazy Irishman) joins up with William Wallace and they converse about killing Englishmen and such, pay attention to Steven's forehead. It's very obvious that the scene was composed of multiple takes because of the way that repeatedly throughout the scene Steven's hair changes. There are a couple of locks of hair that go from being stuck across the middle of his forehead to being off to the side with the rest of his hair. (01:09:00)
Continuity mistake: When Wallace was first seen approaching the deer, he already had the bow and arrow ready, he would just need to draw back and shoot. But in a close up shot of Wallace, he was just taking out an arrow to get it ready.
Continuity mistake: There are scenes edited out of sequence. It is just after the fight scene where Wallace and other Scots storm the fort and Wallace kills the old guy that killed his wife. Well, in that scene, Hamish's father was struck in the shoulder with an arrow, and everybody is dirty and bleeding from the fight. The very next scene we see everybody cleaned up and fine at Wallace's wife's funeral, even Hamish's father can be seen without the arrow in his shoulder. Now, the scene after that, everybody is bloody and dirty again and they are removing the arrow from Hamish's dad. The funeral was edited out of sequence.
Continuity mistake: At the end of the rock-throwing-competition scene between William and Hamish, as William is helping Hamish up there is an openly-bleeding cut on Hamish's forehead where William hit him with the small rock. Two seconds later the cut has sealed itself and there is no blood anywhere on his forehead. (00:25:40)
Continuity mistake: When Wallace is pretending to surrender after the English killed his wife, he is on a horse and he puts his hands behind his head. In all the shots from in front his hands are high on his head, in all the shots from behind his hands are low on his neck.
Continuity mistake: At Falkirk the order in which Longshanks, Robert the Bruce and the English soldier are standing changes from shot to shot. In some shots Bruce is between the soldier and Longshanks and in other shots the soldier is between Longshanks and Bruce without the actors ever moving.
Continuity mistake: In the first battle scene (the first one with Wallace and the blue paint), when Wallace is charging the English you see him grabbing for his sword. In the next scene his arms are at his side. In the scene after that, he is grabbing for his sword again.
Continuity mistake: During a scene showing Wallace and Murron hurrying up a low slope, a funny red light, possibly from a camera, briefly flashes far back in the trees behind them. Watch really carefully to spot it.