Continuity: 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.

Continuity: 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.

Revealing: At the funeral of William's wife, you can see that she's moving her arms when the men pick her up to lay her in the grave.

Continuity: In the battle scene where they flanked their forces and and were going to use the long wooden spears on England's knights, they already had the spears out when it showed England's horses coming closer. Just look around them. It only shows for a second when it is zooming in pretty fast.

Continuity: At Stirling when the English superior charges Wallace, as Wallace shouts "Bastard." you can't see any sunlight on Wallace. When it cuts the sun is shining quite well on him and on his surroundings.

Revealing: In the scene where Wallace comes back (right after his wife is killed), he throws two archers out of the tower. The second archer is supposedly killed on the palisade wall; but right before the camera changes, you can see the wall bending as he lands on it.

Continuity: When the English and the Scots come together at the Battle of Stirling look at one of the Englishmen's swords: it is bloodied even though he has just engaged the enemy.

Factual error: Prince Edward was not a mincing homosexual stereotype. His homosexuality did not become obvious until after he became king and started taking male 'favourites'. Before then he was regarded as the perfect prince.

Revealing: When his wife gets attacked, Wallace jumps over a roof and you can clearly see him wearing modern black briefs.

Revealing: In the scene where Princess Isabelle gives Wallace the remedy to dull his senses, she pours the liquid in his mouth and then kisses him. Then on her way out, you can see Wallace swallowing before he spits out what is supposed to be the poison.

Continuity: When Wallace pounds an English soldier with a large mallet, in the village where his wife was killed, watch the third hit. Wallace hits the soldier in the hip and then in the back. On the third hit, the mallet comes down at least an inch or two from the soldiers head, missing. The soldier jumps as if he was hit.

Revealing: During the first large battle between the Scots and the English, there is a clear, quick shot of an English soldier getting quite eviscerated on the right side of his body. For a fraction of a second, you can see a couple drops of blood splatter against some sort of protective glass between the camera and the soldier.

Continuity: When Wallace was in the bedchamber of a noble lord, he takes out a chain with a ball at the end. The chain is wrapped twice around his fist, and the ball is dangling under his fist; however, when Wallace swings the weapon, the chain is leading outwards from the top of his fist.

Continuity: During the execution scene when Wallace is reflecting and sees his wife in the crowd. Pay attention to the axe as it is coming down on Wallace's neck. As the axe approaches, it slows down as it gets closer. The scene is in slow motion, so look close. [According to Mel Gibson, the executioner actually placed the axe near Wallace's head and then raised the axe. The scene was shot in reverse for the movie. Doesn't make it less of a mistake, but explains it - the axe was accelerating, so in reverse it looks like it was slowing down]

Continuity: In the scene where Wallace and Hamish are discussing throwing rocks while at the wedding, the shots alternate between their faces, depending on who is speaking. From one angle their hair is blowing in a breeze, from the other angle the wind is calm.

Continuity: When Wallace is at his brother and father's funeral at the start of the film, Hamish's and Murron's father are both in attendance. Let's say that this is about 20 years prior to the first battle at Stirling in 1297. 17 years later, the battle at Bannockburn takes place, yet Murron's father is fighting in it, looking not a day older than at the funeral scene which was supposedly almost 40 years prior to it. And when Hamish's father dies at Falkirk, he looks no older than at the aforementioned funeral scene. A miracle anti-ageing cream perhaps?

Continuity: At one point, when a bit player escorts Wallace's friend away, he utters his only line without a Scottish accent. Someone from southern California must be visiting Wallace's army.

Continuity: When Wallace is a boy and they are at the grave to bury his father and brother, the shovels of dirt shake the wrapped dummy body in the grave. 

Continuity: When Philip is thrown out the window by King Edward we see him flipping over in the air so that he will hit the ground on his back. But when the camera changes to the window view we see that Philip is lying on his front.

Continuity: 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.