Continuity mistake: In the beginning when the tank is seen coming it breaks down the same gate twice. (00:01:25)
Deliberate mistake: When the police officer is being ran over the tank you see him falling backwards. When it cuts we see his hat being ran over by the tank. However the way the officer was falling there is no way his hat could have landed under the tank's belt as it does in the next shot. (00:01:55)
Revealing mistake: The Germans in the movie, good ones as well as evil ones, speak German with more or less strange accents. (00:03:20 - 00:04:10)
Factual error: In the first few scenes they show some newspapers. They show Tuesday April 10, 1899, then Thursday May 18th,1899. If April 10th is on a Tuesday, then May 18th can't be on a Thursday, it would be on a Friday. April 10, 1899 was actually a Monday, but May 18th that year was indeed a Thursday. (00:03:45 - 00:04:55)
Continuity mistake: When Reed's cart stops in front of the Kenyan club there's no other cart around, but when the camera angle changes there's another one passing by. There's also a huge basket on the side of the road which hasn't been there before. (00:05:20)
Visible crew/equipment: In the shot where Quatermain shoots at three of the attackers they are attached to wires you see running across the floor, probably needed to trigger off the sparks from their steel armor. (00:09:00)
Continuity mistake: When Quatermain hits the man to the ground before breaking a bottle on his head, you can see a shotgun on the floor next to the man. When it cuts, the shotgun is gone. (00:10:00)
Other mistake: Before Quatermain shoots the fourth attacker long distance he puts on his glasses, cursing his getting old. However, when he aims he looks over the rim. (00:11:05)
Continuity mistake: When the man Quatermain wounded with his shotgun swallows the poison pill, you can see a lot of people close behind the man. When it cuts, everyone has moved a few feet away from the man. (00:11:25)
Continuity mistake: When the fourth attacker is brought before Quatermain he poisons himself. He falls on his back with his right arm stretched out behind him, but when the camera angle changes the arm is lying sideways. (00:11:30)
Continuity mistake: When the building explodes in the beginning, the man sent to recruit Quatermain walks close to him. When it cuts the man is a few feet away from Quatermain. (00:11:45)
Factual error: In a shot near the beginning of the film, the gravestone for Allan Quatermain's son is misspelled "Quartermain". [People are trying to correct this, saying the spelling's correct - no it's not: http://uk.imdb.com/Title?0311429.] (00:12:50)
Continuity mistake: When Reed and Quatermain arrive in London to meet M and the carriage stops the road is empty. However, when the camera angle changes another carriage is passing by. (00:13:00)
Factual error: When the League arrives in Venice, Carnivale is being celebrated. In the film they leave London in July and arrive there a few days later, but in Venice, Carnivale is celebrated on the last weekend before Lent - which differs from year to year, roughly between early February and early March. (00:13:15 - 00:53:05)
Continuity mistake: When Quatermain arrives in London, he is greeted by Reed who leads him down some stairs. In the shot where they're going down some spiral stairs, for some reason you see a different actor (who is clean shaven) posing as Reed, going down the stairs holding the umbrella in his right hand. Then in the next shot you see the "original" actor who has a slight goatee and is holding the umbrella in his left hand. (00:13:25)
Continuity mistake: In the scene where Quatermain first meets M, they're in a library with a long table in the middle. When Quatermain sits down in the chair, a folder magically appears which wasn't there before in the other shots. (00:14:15 - 00:15:15)
Factual error: When M tells Allan Quatermain that he and his team have four days to go from London to Venice, he answers that this is impossible, and captain Nemo replies that it will be possible thanks to his science-fictional devices. Actually, on late 19th century railways, this trip would have taken less than two days. For example, the Peninsular Express departed every Friday afternoon from London, and it arrived at Brindisi, a considerably more distant town in southern Italy, on Sunday afternoon. (00:16:39)
Continuity mistake: The invisible man is seen in one shot with cream covering the majority of the front of his face but it ends towards the middle of his head. When he is in the automobile, the cream is now completely covering his head and neck. Then, when they go to see Dorian Gray, only his face is covered with make-up again. (00:17:50 - 00:22:35)
Continuity mistake: How can the invisible man cover his face with white cream so we can see him, but his stubble is visible throughout the movie as dark brown only when he has the cream on his face? It can't be because cream's on it, because then it would be white. (00:19:55)
Suggested correction: This is likely a lighting issue as the actor is famously red haired.
Continuity mistake: When The Phantom tells Quatermain to drop his gun, Quatermain drops it. It cuts and we see the gun landing with the handle pointing out. The way Quatermain dropped the gun the handle should be pointing in. The gun could not have changed angle that quickly when watched how it is dropped. (00:24:00)
