Continuity mistake: When Teddy grabs his dead daughter in the lake and cries, his fringe is all wet and covering the forehead. When the angle changes, it's combed to the left.
Continuity mistake: When Teddy arrives home and sees his wife on the swing, the ducks in the lake appear or disappear depending on the angle.
Continuity mistake: While Teddy Daniels is talking to George Noyce in his cell in ward C, each time the camera angle switches the way he holds his match changes.
Continuity mistake: When Andrew first sees his dead children in the lake they are floating right next to the bricks around the lake but a few seconds later Andrew has to swim to almost the middle of the lake to get them.
Suggested correction: This is another representation of the trauma Andrew has experienced. How long do you think that 'swim' would be if you were trying to save your children?
Continuity mistake: During the dying German scene, the needle on the record player moves backwards between the first and second angle, in barely a couple seconds.
Continuity mistake: On the boat, Teddy lights up a cigarette and holds it in his mouth. A frame later it appears in between his fingers.
Continuity mistake: During Teddy's interrogation of Bridget Kearns, she takes Teddy's notebook and writes something on the page to the left. Yet, when he shows the notebook to Chuck Aule, all of Bridget's writing is on the page to the right.
Continuity mistake: After Teddy takes his dead daughter's shoe off, its position changes between angles.
Continuity mistake: After Chuck gives Teddy a cigarette at the beginning of the movie, Teddy's left hand is holding the railing and has no wedding band on his ring finger. The ring is present in all other shots.
Continuity mistake: During Teddy and Chuck's interview with Peter Breene, when Teddy scribbles with the pencil in his notebook (which annoys Breene), the force of the rather large slanted scribblings tear the paper. After Teddy says, "Do you know what she was afraid of," in the close-up that tear is gone, the scribbling has changed shape and we can see that some pages have been torn out of the notebook (likely from prior takes). Then in a following shot the scribbling is smaller.