Corrected entry: Throughout the entire movie you can see little cameras watching Jim Carry, but you have to look for them. There is one on the side of the neighbor's garbage can.
Corrected entry: Truman's car has no headrests. This is so the camera can get good shots of his and Meryl's faces and reactions, but he would be unlikely to drive without them.
Corrected entry: When Truman is going about his normal life, it shows the angle of the camera on his ring. However, when Truman escapes his normal life, they for some reason never think of checking this camera. It would have saved them a lot of trouble...
Corrected entry: When Truman is looking into the mirror in his bathroom and we see him front on, you can see that there is a shelf of shampoo and bathroomy type bottles sitting on a ledge beneath it. When the camera cuts to show Truman actually standing in the bathroom, there is no shelf at the bottom of the mirror.