When Carter is in the club singing and invites all the ladies up onto stage with him they are all wearing sequined dresses. When Lee runs out, the women around Carter are wearing beige/tan tops. In the next scene, their dresses revert to the dresses again.
The first two letters on Lee's license plate are JY, however when he drives Carter to the airport, they read JG.
When Lee is sitting in a car, the song "I'll be missing you" by Sean 'Diddy' Combs, starts to play on the radio. We cut away to the caller and then back, apparently in real time, but now the song on the radio is almost at its end, although only three seconds have passed.
When Lee and Carter arrive back at Lee's office, and are putting their clothes back on. Lee puts his tie on backward, in the next shot, it is right.
The truck's trailer leaves L.A. with polished aluminum wheels. By the time it gets to Las Vegas it has painted wheels.
Carter buys into the craps game for $100,000 and two stacks of 20 chips were then slid in front of him. He complains that he was given $500 chips. It would take ten stacks of $500 chips to make $100,000.
When Agent Molina is explaining the situation with the printing plates and the counterfeit money to Carter and Lee, Carter asks how they manage to get into the US Mint to use the printing presses. But the US Mint makes only coins - paper money is made by the Bureau of Engraving and Printing.
In the final fight between Hu Li and Isabella at the Red Dragon, Hu Li steals Isabella's Colt Mustang. As they fought over the gun, 10 rounds were fired, 9 in the air during the struggle and the 10th hitting Isabella in the shoulder. As a Colt Mustang only carries 5 to 6 rounds, it is impossible to fire 10 rounds.
In the beginning of the movie, you can see a woman carrying a bomb into the American consulate in Hong Kong, as confirmed by the sign at the entrance. However, later reference is made to the explosion at the embassy instead of the consulate.
Lee's hands come apart when he jumps over the table, even though they are supposed to be taped together.
The wall in the massage parlor moves when pushed during the fight.
When Carter, Isabella, and Lee are talking in the motel room, the camera can be seen reflected in the glass on the upper right hand corner of the screen.
When Carter fights Hu Li in the casino, she stabs a sword into his money bundle and while he is screaming a crew member is visible behind the Chinese figure while holding it.
When Hu Li spins off the roulette table during her fight with Carter, you can briefly see Zhang Ziyi's mic pack under her blazer.
Lee and Carter arrive at the Yau Ma Tei Police Station while inside the station the signs say Central Police Station - two different areas of Hong Kong.
As Lee and Carter sit in the black convertible Corvette, the boom is reflected in the windshield.