Other mistake: At the end of the movie on top of the pyramid, a guy comes from the right side. Jet hits him in the stomach, and then in the face. But you can see that Jet Li doesn't even come close to his face. (01:16:45)

Continuity mistake: When the evil Jet Li hits the motorcycle cop with his motorcycle, he crashes into a store gate and bends it. The camera angle changes to a wide shot and the top of the gate is now broken when it wasn't in the previous shot. (00:48:35)

Continuity mistake: Right before the evil Jet Li shoots the cop Jet Li, the cop Jet Li slides down a concrete wall with a huge groove in it. In the next close-up, he turns around and he is standing farther down in front of the wall. (00:23:05)
Other mistake: In the king of the hill scene, there is a point when the evil Jet Li pulls down two guys. You can see bits of the green screen in those few frames.
Continuity mistake: When Jet Li arrives home after checking himself out of hospital, on his way up the stairs there's no light visible through the curtains. Just after he reaches the top, we can see them again behind Carla Gugino, and there's daylight pouring through them. (00:24:25)
Continuity mistake: Right after the prison escape, Jet Li goes after another version of himself that is a cop. The evil Jet is hiding in the duct work, and even though the majority of cops are firing their weapons straight ahead, the bullets are hitting the duct work 10 feet above them. (00:20:30)
Continuity mistake: When MVA Agent Harry Roedecker is hitting the evil Jet Li with the fire extinguisher you can tell that the entire scene was pasted together because Jet Li's hands are up in one shot then down in the next, then back up again as he's being hit. (00:44:15)
Factual error: When Gabe is confronted by his fellow officers after they think he went crazy, he gets into a short fight with them. He subdues them handcuffing them together and to a wheelchair. The chains on the handcuffs are much too long as to what they should be. This was done to allow the stunt to be done correctly. (00:37:40)
Audio problem: When TK finds Yulaw in the attic, Yulaw is impersonating Gabe and asks TK to get him a gun. Just before she walks away, the last thing Yulaw says is "TK." But his lip movements don't match up to what he says. (00:55:10)
Revealing mistake: While still fighting on the cat walk, Yulaw does a spin kick at Gabe's face. You see Gabe react as if he got kicked in the face, and tumbles over the side. You can see the kick never even contacts Gabe's face as the stunt double reacts to it. (01:07:45)
Continuity mistake: When TK sees the dust on the floor below the attic hatch, she takes off a white jacket and drops it on the floor right next to it. She then goes to get a chair and returns. Now the jacket is gone. (00:54:10)
Revealing mistake: During the fight between Yulaw and Gabe, while on the catwalk up high, they both jump into the air. Yulaw kicks Gabe, who falls to the ground quickly. The shot showing Gabe hit, was poorly done, showing him fall much too slowly, and having a soft impact with almost no bounce at all. (01:07:55)
Continuity mistake: In the chase scene after Yulaw kills Lawless, it shows him leaping across a gap between two bridges. In second shot, when he first start the jump, it shows him make it half way across the gap. Then the next shot shows him barely past the first railing, not close to half way yet. (00:07:10)
Continuity mistake: When the bad Jet Li is running from the cops, you can see 3 cop cars, but when he jumps from one bridge to another, you only see 2.
Chosen answer: After he says he will go to the hospital, his wife says "ni shuo de" which simply means "you said so" (so now he has to do it).
tw_stuart