Continuity mistake: When the Horsemen team are ready to play the start to skate up to the arena. You see a back view and Jonathan clearly doesn't have his white T-Shirt over his black suit. They cut to someone else then back to the team and Jonathan clearly has his white shirt on.
Other mistake: In the scene where Ecks is chasing Sever, you see Ecks put a shell into an open chambered shotgun. This means that there is only one shell in the gun. A moment later when he yells stop inside the building he cocks the gun again. Thus, he is holding up Sever without any shells in the gun.
Continuity mistake: In the scene where the townspeople are fleeing to the mall there is a shot of the Deputy driving the car. You can see the top left hand corner of the windshield is covered in green goo, but when you see them parking the windscreen is completely clean. (01:03:35)
Other mistake: Towards the end of the film, after Snipes beats up of a lot of vampires, Whistler throws Blade's sunglasses to him. They show him throw them in one shot, then in the next shot they show Snipes catching them. But look in the background at Whistler, he doesn't have the glasses, but is moving his arm like he is throwing them. The glasses must have been computer animated, and bad editing contributed to this mistake. (01:37:34)
Factual error: As the 1st Battalion, 7th Cavalry lifts off from LZ X-Ray at the end of the battle, it can be seen that there are no more American troops left at the battlefield. However, by the time 1/7 CAV left LZ X-Ray, it had been relieved by two full battalions (2/7 CAV and 1/5 CAV). There were around 700 American soldiers occupying LZ X-Ray by the time 1/7 CAV lifted off.
Revealing mistake: One of the first times you see Balthazar (Michael Clarke Duncan) you can clearly see the adhesive for the fake scar on his right cheek and that it is coming loose. (00:06:00)
Continuity mistake: When the Powerpuff Girls use their laser eyes to make windows in their room, the windows are oval. Later in the movie, such as when the Powerpuff Girls are sleeping the night before 'The Day', the windows are circular.
Factual error: In the scene where MGySgt Beckett and his female Balkan contact are in the basement weapons storage area, he is searching for a sniper-capable weapon to use to rescue Sgt Cole his captors. He holds up an old rifle and refers to it as a "Mauser, 7.92mm, best rifle the Germans made". He is, in fact, holding a Soviet era Mosin-Nagant M1891 rifle, probably chambered in 7.62x54mm.
Continuity mistake: That must be some damn good string that Mercedes wraps around her finger - 16 years and it's not even dirty or frayed. (00:15:00 - 01:51:15)
Continuity mistake: At the end of the movie when Owen Wilson stops Eddie Murphy from leaving after they see that Carlos has taken credit for saving the day and is telling him about the hover gel there is a black car outside behind Eddie that people get in and leave, then the car is back, disappears and reappears when the camera is going back and forth from Eddie to Owen.
Revealing mistake: When the megalodon attacks the yacht the party goers jump off the yacht, and some of them reach the large round safety raft. To the raft's right, there is a visible yellow line attached to it so it doesn't drift away for the shots.
Continuity mistake: The opening scene in the shopping cart must have been filmed in two places. At one point you can see the end of the road, which is just a brick wall, but they crash into a market.
Factual error: When the archangels jump from the helicopter, the "bait" is looking behind him saying he can see the dragon. For a parajumper to look between his legs to view behind himself, he would de-arch and thus de-stabilise himself while travelling at that speed. It would send the jumper into a barrel-roll spin.
Revealing mistake: When Chosen One meets Ling and she shows her bra for a second, her shirt doesn't even open the way she opened it. (00:17:40)
Visible crew/equipment: As the camera follows Cooper's grenade on the floor, we can briefly see the shadow of some equipment move along the floor. (01:26:45)
Continuity mistake: During "The Li'l Zé story" before Li'l Dice (Dadinho) kills Goose (Marreco), a woman's white purse changes position, from the right side of Li'l Dice to his upper left side, between the shots. (00:40:05)
Continuity mistake: When Dr. Doppler and Jim first observe their ship, Dr. Doppler is right next to Jim when he points it out. When the shot changes to a long shot, they're much farther apart. (00:16:55)
Continuity mistake: When Rex strangles Pluto, Dina, who was right by Pluto's side in the close-up, disappears in the side-on shot.
Revealing mistake: When the survivors are walking in the rain and find the cabin, they are sopping wet, only a few minutes later they are perfectly dry. You can not dry out that quickly in the tropics.
Plot hole: When Eldon checks out the address Van Meter gave him he finds where Orchard and Sidwell are living. All well and good, except: A) The utilities bill is in the names of Orchard and Sidwell, who are known wanted felons in L.A. and B) even more implausibly, the bill is in BOTH their names.