Continuity mistake: Whilst examining the wrapper with "Karaboudjan" written on it, the "K" is a centimeter away from the letter "A" and all the other letters are about a fifth of a centimeter away from the letters. Tintin then places a magnifying glass above the word "Karaboudjan". After doing this, the "K" that was a centimeter away from the "A" is now a fifth of a centimeter away from the "A", but none of the other letters seem to have changed distances.
Other mistake: In order for Rastapopoulos to break into the secret passageway, he places chunks of dynamite around the idol, then lights a fuse for each individual chunk of dynamite, all burning at the same time. The fuse for the dynamite near the middle of the idol is significantly shorter than the fuses for the others. Despite this, it still takes the exact same amount of time for all three to burn down.
Plot hole: Whilst Allan is searching the decks below for Tintin, a crew member is keeping watch of Captain Haddock in his quarters. Tintin secretly reveals to Haddock that he is hiding underneath his bed, without letting the crew member notice him and Haddock then looks towards him. The crew member was watching Haddock the entire time, so how does he not notice Haddock looking toward Tintin?
Continuity mistake: After arriving in Jakarta, Haddock is correcting Professor Calculus telling him it is not Sydney. The last time Haddock tells Calculus this, he's saying "It's not Sydney yet. It's Jakarta", and Haddock has pale skin and is also looking annoyed. Calculus then says "Yes, I know" and Haddock suddenly has more tanned skin and is smiling.
Continuity mistake: When Mr. Carreidas and Mr. Spaulding walk over to Tintin, Haddock and Skut, in the shot where Skut says "Mr. Carreidas, these are my friends", the money that Haddock previously placed into Carreidas' hat is sticking out of it and a portion of the note is tucked into Carreidas' hat. In the next shot, only the top right corner is tucked into into Carreidas' hat.
Continuity mistake: On the plane, Carreidas is playing battleship with Haddock. Whilst he is saying "C4. D4. E4", he places his pen on the right hand side of the page, but when he crosses out E4 in the following shot, the pen is suddenly pointing near to the left hand side.
Continuity mistake: After Snowy runs away, two gunmen grab ahold of Tintin, restraining him. As Tintin is yelling "Cowards! Murderers!", the gunman on the left is holding Tintin's upper arm with his right hand. The shot cuts to a closer angle of Tintin and there is no sign of the gunman's right hand.
Revealing mistake: When Carreidas tells Rastapopoulos that he is mad and Rastapopoulos replies "No, just well informed", Rastapopoulos begins to walk around Carreidas. As he is walking around Carreidas, the cigar in Rastapopoulos' mouth clips through the string in his monocle.