Continuity: The ring that Lomax places on a shelf appears and disappears.
Incorrectly regarded as goofs: The shadow of some equipment appears in the trailer when Lomax walks down the empty street in New York but was removed from the film.
Boom mic visible: Reflection of boom mic on tiled wall as Kevin talks to Mary on payphone.
Incorrectly regarded as goofs: In the nightmare scene, we see Mary's eyes open, she gets up from the couch, then we see her back on the couch and open her eyes again (identical footage). But since this is a nightmare, strange things are possible.
Continuity: When Barbara's father tries to attack Kevin in the courtroom at the beginning of the film, in the first shot he is stopped only by two security guards, but in the next shot - wider angle - Barbara's attorney can be seen standing and stopping him too, to again be calmly sitting in the next shot.
Revealing mistakes: By the position of the Empire State Building (which is on Milton's left in one wide angle) visible in the far background behind Milton in his close-ups while Milton and Lomax are talking on the rooftop, it's obvious that Milton is not actually standing on the edge during those close-ups.
Continuity: When John Milton is talking to Kevin Lomax outside the courthouse, some of his hair begins to stand up as a result of the wind. In the next shot his hair is perfectly in place.
Continuity: When Pam talks to Kevin outside the hospital, the shadows show that the sun is not aligned to the street. But as Kevin looks down the street, the shadows are parallel to it. When he looks back at Pam (who has disappeared) the shadows are angled again. And when he starts walking down the street, the sun is once again aligned to it.
Continuity: Kevin's fingers when pointing at Cullen after he slams Kevin against the wall.
Audio/visual unsynchronized: Mary-Ann says "You have to believe me" without moving her lips.
Continuity: When Cullen drops his gun on the floor, we can see that the gun is exactly opposite the left table. When he kneels down to pick it up, the gun is about 3 feet away from the table
Continuity: When Kevin and Milton are on the rooftop there's a shot they're almost at the end of the rooftop, but then in the next shot they're walking a lot further.
Continuity: At the end of the movie, Kevin fires 10 shots from a seven-shot pistol without reloading.
Crew or equipment visible: During the closing credits, when the fireballs are forming, at one point you can see the flamethrower creating them.
Continuity: When Kevin embraces his wife in the churchyard, he swings her around and when kissing her ear, takes her pearl earring into his mouth and then gives it back to her. In the next shot her earring is still clearly visible in place although she has not had time to replace it.
Errors made by characters (possibly deliberate errors by the filmmakers): Milton claims Pam used to work in the "Brooklyn County DA's Office". There is no Brooklyn County as Brooklyn is in King's County.
Audio/visual unsynchronized: When Kevin asks the limo driver where Mary Ann went, we hear the driver say: "The Church of Heavenly Hope", but his mouth says something different.
Errors made by characters (possibly deliberate errors by the filmmakers): When John Milton bluffs Kevin and tells him to quit the Alex Cullen case, Kevin's answer is "You know what scares me, I quit the case, she gets better...then I hate her for it". At the end of the movie, when John Milton replays the conversation, he says "You know what scares me JOHN, I quit the case, she gets better...then I hate her for it".
Errors made by characters (possibly deliberate errors by the filmmakers): Neal Jones, the actor who plays the Florida reporter, is called "Harry" in the Florida bar scene at the beginning of the film, and "Larry" in the courthouse hallway at the end of the film.
Audio/visual unsynchronized: When picking out candidates for the jury, the inquisitor says "You can either stop this shit, or I walk." The guy looks at him and says "Walk." In the next shot, you see his lips move to say "Walk" again, although no sound is heard.
Incorrectly regarded as goofs: After Kevin shoots Milton, there are a few bullet holes in his clothing. These holes disappear in subsequent scenes. However, his supernatural powers may be the explanation for this.