Continuity mistake: When Samuel dies in the movie, if you watch closely there is blood running down his face in only every other shot.
Continuity mistake: When Suzanna comes in for dinner the first night there, all the guys raise something to give her, but Tristan goes to raise his plate. But cutting back from her reaction, he has only lifted his glass to drink. (00:15:20)
Continuity mistake: Susannah's hair problems during her first encounter with Tristan after his many years of absence have been stressed already. But Tristan's hair has an even stronger mind of its own, as there is a wide strand combed back covering his parting, which looks as if it has been fixed elaborately, but which nevertheless comes and goes during the scene. (01:25:50)NancyFelix
Continuity mistake: After Tristan's second return he comes to Susannah's house. They make eye contact while he is still standing behind the wall. The camera cuts to Susannah and then back to him, and he is standing in the garden, with no time in between to walk further down to the gate and enter. (01:24:55)NancyFelix
Continuity mistake: During Samuel's death where Tristan is cradling him in his arms, there is a stream of blood at the corner of Samuel's mouth. The camera cuts to Tristan's reaction, but when it cuts back to Samuel, the blood is gone. In later shots of Tristan preparing to remove his heart, the blood stream reappears. (00:44:00 - 00:44:55)Steph_Jared
Continuity mistake: When Tristan returns to see Suzanne at her new home with Alfred, her hair is down. But in every shot her hair is either pulled behind her ear, then both sides in her face, then one side pulled back, and so on. (01:25:55)
Continuity mistake: When Susannah finds Tristan crying at Samuel's grave she takes him into her arms and consoles him. This is seen from different angles, with Tristan's hair behind his ear or not, and in one strange brief shot with a straight, expressionless face, very different from all others where he is sobbing hard and his face is twisted with grief. (00:53:25)NancyFelix
Continuity mistake: When Tristan and Samuel hug in the trenches in the war, at first Tristan's chin is on top of Samuel's hat, but when it cuts to the other angle, their heads are level, side by side. (00:36:00)
Continuity mistake: In the scene of Alfred and Tristan at Susanna's grave, when shots of Alfred show him speaking to Tristan, he looks to his right, as if the two men were side by side and facing the grave, and they seem to have been side by side in the last shot in that scene, when they leave the grave-site. However, the sun lights the left side of Alfred's face, and in the alternating shots, which show Tristan listening to Alfred, the sunlight is on the right side of Tristan's face.