Continuity mistake: When the princess and her chambermaid are talking about William and how they killed his wife, at the end of the conversation, the princess leans back against the edge of the archway. In the next shot from over her left shoulder, she's not leaning back, but sitting straight up.
Continuity mistake: After being knighted, William says that he will invade England. In the close-up shots of Robert in the group reacting to him saying this, you can see the man whose bride was taken away by the English lord earlier in the film behind him. But, in the wide shots, he's not there. It's just some random man behind him.
Continuity mistake: During the battle of Stirling, the archers' arrows hit the Scottish shields and are sticking out. When the army stands up to mock the English again, the arrows are gone.
Continuity mistake: When Mel Gibson is disembowelled, in one shot there's no blood on his neck, but in the very next shot there is.
Suggested correction: Could that be because in the first scene his shirt is torn open, and they haven't started the disembowelment. Then they start the process and blood spurts up across his chest and neck?
Continuity mistake: 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 mistake: 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.
Continuity mistake: 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 mistake: 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 mistake: 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 mistake: 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]
