Other mistake: When Quatermain impales the henchman at the beginning of the film, the rhino is hung high on the wall and the tip is much higher than the spot the man hits, Quatermain would have to have lifted the man higher than he does to achieve this.
Continuity mistake: When the men attack Quatermain in Africa, at one point he hits one guy with a bottle. The bottle completely shatters and there's nothing left to hold. When it cuts back to Quartermain, he's holding a big piece of a broken bottle.
Suggested correction: You can see the bottle in his hand in the scene where it shatters.
No, you can't. The bottle completely shatters. Then in the next cut he's holding the bottle.
Continuity mistake: From the meeting with M to Dorian Grey's place, the amount of makeup showing Skinner's head varies too quickly to be real.
Factual error: In Kenya, Alan Quatermain pushes a guy back with a table and impales him on a horn on the wall. The table hides the wound, but the horn punches through. If this guy was impaled on that horn, it would have some blood on it. However, it's just as totally clean as it was before.
Revealing mistake: Just before the Britannia Club blows up, Sanderson Reed steps through the poisoned guy's wrist.
Other mistake: In the scene when the League are attacking the factory, we see Captain Nemo demonstrating his skill with his sabre. In the last shot before the scene changes, he cuts down a number of people and then sheathes his sword all in one movement. The camera angle is from the side where his scabbard is hung, and although you can hear the hissing sound of the blade being sheathed you can see the sword completely misses the scabbard and is just stuck out behind him. This is obvious because the sword is silver and the scabbard is black.
Other mistake: In the scene right after the team gets a Morse code message from Skinner, we see the holes made in the Nautilus. The one in the middle is smoking whereas the one in the back is not. If the ship was filling with water to the point that is was immersed due to the holes then whatever explosive components would be wet and extinguished. So by the time the Nautilus resurfaced, it should not have been smoking at all.
Continuity mistake: During the brawl in Kenya at the beginning of the film, one of the goons is seen throwing knives at Alan which seem to pin him to the wooden pillar; yet in in a previous shot just before Alan slams the table onto one of the goons, the knives are already embedded in the pillar.
Other mistake: When Sawyer tries to take a shot at the Phantom just before he escapes from Dorian Gray's attic, Sawyer fires once, but two impacts are kicked up from the dusty floor. And the impacts come in to rapid succession for a manually operated rifle, even with a crack shot using it.