Factual error: In the scene at Lord Cornwallis' outdoor party celebration, right after Benjamin Martin and his Continental Army blows up a British Ship, one of Lord Cornwallis' Captains throws back a big gulp of his drink from his Martini glass in grief and disbelief - the problem is this movie takes place in the mid 1700s and the Martini Glass wasn't invented until the 1920s, during the Roaring Jazz days.
Continuity mistake: After mowing down all the Immortals during the Sanctuary scene, one Watcher tells another to take their heads because they might be Immortals. You see the Watcher to the left side of the screen and a robed figure to his left about four feet away drawing his sword. Suddenly, that same robed figure is now to the Watcher right side and about two feet away.
Continuity mistake: When Jet Li is playing football in the park and Maurice falls on top of him, Maurice's scar is on the left side of his lip, then when the camera cuts back to him it's on the right side. (00:50:40)
Other mistake: During the ending scene, when Samuel L. Jackson is walking away from the camera across the lawn, he passes directly between the platoon on the right practicing rifle drill, and the platoon leader giving them orders. Marines are taught to NEVER do this. It is called "breaking ranks", and a Colonel in the Marine Corps would have known this.
Character mistake: When the biologist guy talks about writing code for DNA he names the four codes as A, G, T, P, when they are actually A, G, T, C.
Continuity mistake: After the charity dinner, Meg Ryan and David Morse are having a fight in their kitchen. Note a missing drawer on the right hand side of the greenish cabinet. But at the end of the scene, when Morse leaves the room, the drawer is back where it belongs.
Factual error: When Buck first sees the videotape left behind by Pastor Billings, Bruce Barnes tells him about a prophecy contained in "Daniel Nine, Chapter 27." As a pastor, Barnes should have known that the Bible is divided into chapters and verses. He should have said "Daniel 9:27," "Daniel Chapter 9, Verse 27," or "Daniel Nine, verse 27." The point is, "27" is the VERSE, not the CHAPTER. (01:15:05)
Suggested correction: You have to keep in mind that Bruce was one of the only people in the church to be left behind. He admits himself that he wasn't where he should have been spiritually. So it makes sense that he wouldn't quote scripture properly at this point, he was practically a brand new Christian that was thrust into leadership, learning with his new congregation.
Continuity mistake: Near the end of the film, Adam and his clone make a jump for the helicopter to escape the explosion. In one scene, you'll see Sport Jacket Adam holding the ladder to the helicopter with Leather Jacket Adam holding onto the legs of the first Adam. After a cutaway scene, you'll see these two have switched places (Leather jacket on ladder, Sport jacket on bottom). The next time you see them, they're switched back in the correct order. (01:52:30)
Revealing mistake: Just after Li Mu Bai tells Shu Lien that they are very close to her headquarters and that she should check in, we are treated to two 'time pass' shots of forest. The second of these features some very obvious power or telephone lines in the lower right corner of the screen. (01:22:40)
Deliberate mistake: In Paris' death scene, he blows alcohol onto his torch that illuminates the creatures around him. However the area is still illuminated after the light from his torch has disappeared. (01:12:05)
Continuity mistake: When Samuel Jackson is about to be shot by the two corrupt cops, the Vanessa Williams character comes up from behind and shoots the black one in the head and he falls down. Then, they show her talking, and the same black man's arm and partial shoulder are in the shot.
Continuity mistake: When the crew pull the hook out of the man's hand, he puts a spoon in his mouth - its facing right, but when he's done it's facing left. (00:55:15)
Continuity mistake: During the scene where Akima gets out of the shower, we see Cale going over some of the stuff she collected that's sitting on her table. On it there is a baseball and a picture frame that's lying flat on the table. Cale picks up the baseball, says something to Akima and puts the baseball back down on the table, where it rolls over the picture frame as if it was flat as the table.
Continuity mistake: When Eric Roberts reaches for the gun on the roof, he's wearing the jacket of his suit again, when he took it off 20 minutes before.
Continuity mistake: When we see the police officer checking the hit counter on an adult web site, the hit counter goes down from 1,739,986 to 1,739,944 a few seconds later.
Deliberate mistake: You might be wondering where Terry suddenly comes up with Jolly Jack all of the sudden after escaping the lab. In the commentary, they say that the Joker, in his transmission to Terry in the lab, was supposed to be eating out of a candy jar with "Jolly Jack" on it, but couldn't have it due to time constraints.
Continuity mistake: When Profion approaches the wheel with the sword, the wheel is almost stopped with the white blob on the right. Shot changes to the wheel totally motion less and the blob is on the left.
Continuity mistake: Luke McNamara is handcuffed behind his back at the police station but as he is loaded in to the ambulance he mysteriously is cuffed in front. [The handcuffs inside are normal police issue handcuffs and outside as he's getting into the ambulance they're attached to a belt, normally used for criminals they consider dangerous.]
Continuity mistake: When Agent Connolly first finds the bomb on the ship, he is knocked over by Iris, dropping his gun. In the next scene, when they are running up the stairs, he has the gun, which he forgot to pick up.
Visible crew/equipment: When the car is sitting in the back of the trailer there is a cable visible connected to the front of the car. In the next scene the cable is gone.