Other mistake: In quite a few shots during the film, it is much too obvious that there are no lenses in Harry's glasses, whereas in previous and following shots the glasses have lenses. A couple of instances are: when Harry drinks the Felix Felicis and when Harry kneels beside Dumbledore, at the foot of the Astronomy Tower.
Other mistake: During the time capsule recovery ceremony, there is a man standing next to Nicolas Cage, who pulls out his cell phone to take a picture of the ceremony. However, he's holding the cell phone wrong, pointing the camera towards himself.
Other mistake: After Langdon saves the last of the Preferati by diving into the fountain, he heads off to St. Angelo with dry clothes. Since it is only ten or fifteen minutes later, his clothes should be soaked.
Other mistake: When Daniel is playing Guitar Hero with his friends, after he and his friends leave the game to go outside, if you look closely at the TV, you can see that the game is still playing (notes are still being strummed) even though there is no one at the controls. (00:23:05)
Other mistake: When Holmes searches for hidden door after St. Thomas' death he bumps the door and it moves before he knocks on the wall to find out which side seems to be a door.
Other mistake: When Anton is swinging below the bridge to rescue Tony from his hanging, he bumps into him. At that moment, Heath Ledger opens his eyes, breaking character for a split second.
Other mistake: Inspector Clouseau concludes Miss Solandres was the thief by looking at her license plate and discovering he gave the car a fine 2 days before she claimed to have arrived in Paris, 1 day before the Pink Panther was stolen. However she told Clouseau her car was a rental moments earlier, therefore he should've assumed the fine applied to the previous renter as Clouseau had no reason to doubt Miss Solandres' story at that point. (01:10:00 - 01:25:00)
Other mistake: At the end, when Esposito is looking at the piece of paper where he wrote "Temo", he put that paper over the pages of the novel and we see one of the pages. In the third line there is a handwritten "A" over an existing "a" between the words "pAsó" and "ese." In the fourth line there is an existing "a" that's not overwritten in the word "la." But the typewriter had a missing "a", so there should be none in the text.