Continuity mistake: In the travel agency, some pencils appear, others disappear, and others change position during the whole scene. (00:43:00)
Continuity mistake: When Truman opens the trunk in the basement, the stuff inside changes completely in the close-up. (00:17:25)
Continuity mistake: The lamp falls on a sunny side of the pavement. When the shot changes it's on a shady part. (00:03:15)
Continuity mistake: In the scene just before Truman sees his dad as a homeless man, there is a woman in a white sweater holding a shopping bag in her right hand. When Truman turns, the bag switches to her left. (00:15:05)
Continuity mistake: When Truman is watching how the lamps falls from the sky, the shadow on the front of his car appears and disappears depending on the angle shot. (00:03:40)
Continuity mistake: When Meryl holds the Chef's Pal, the position of her hands differs depending on the shot. (00:09:15)
Continuity mistake: Just before Truman turns around to see his dad as a homeless man, there is a woman in a white sweater behind him. When Truman turns, the woman is in front of him. (00:15:05)
Continuity mistake: When Truman meets his father, there's a man on a bike, 5 meters behind them, riding really slowly. A second later, from a new angle, the bicycle is 10 meters in front of him. (00:15:00)
Continuity mistake: In the scene where a lamp fell from the sky in front of Truman, the damage caused to it seemed somewhat insubstantial, bearing in mind the height from which it surely must have fallen in order for it not to be visible from the ground in the first place. (00:03:15)
Suggested correction: The reason it wasn't visible in the first place is because there was a screen/cover on the walls of the dome as shown at the end. Not to mention those lights are heavy duty, mostly made of metal so it's extremely likely that it could have fallen from a height like that (probably the height of a 20 story building) and gotten the damage that it did.