Other mistake: Emmett states that the Cullens "haven't hunted in weeks", meaning all of the vampires should have black eyes. However, all of the actors still have their golden contacts in. This is especially noticeable on the Blu-Ray.
Other mistake: When David Norris is first trained in using the doors he is told to turn the handle clockwise yet one of the first doors he uses is a "push bar" door that can't be turned at all.
Other mistake: Jacob takes Cal shopping. In the shot during which Jacob says to Cal "the skin under your eyes is starting to look like Hugh Hefner's ball sack," the film is flipped and the viewer is watching a reverse (or mirror) image. This is revealed principally by the fact that the emblem on Cal's Polo shirt is on the right side of his chest as opposed to his left.
Other mistake: When Gil is walking by the banks of the river, watch the left side of the bridge ahead and you'll see a crowd watching the filming.
Other mistake: To get revenge against the reds for chopping off his hat, Benny goes inside the house to use the computer to change the woman's lawn mower order. Benny never hits the 'ENTER' key to complete things. Things are completed when he steps on the 'SPACEBAR'. Same thing happens later when Benny is ordering a female flamingo.
Other mistake: When the airship crash lands in the garden at the end of the film, D'Artagnan, Athos, Porthos, Aramis and Constance are all still aboard, along with the Queen's diamonds. However, only a minute or two later, the Queen emerges wearing the perfectly polished diamonds, and Constance is behind her, her hair, dress and makeup impeccable. This could not have been achieved in the time between the ship crashing and then.
Other mistake: When Adam picks up Emma and is leaning against his car, he pulls a "bouquet" of carrots from behind his back, but just prior he had nothing in his hands.
Other mistake: Anna's birthday is in January, making her an Aquarius or Capricorn. Yet she's shown looking up her horoscope under Taurus which is for April-May.
Other mistake: At the beginning of the trip we see close-ups of the passports of the three girls being stamped. The date is 19 Jun 2010. During the climax of the movie Emma's boyfriend puts a copy of "Le Parisien" on the counter, and the date there is Jun 10 2010. (00:12:00 - 01:26:20)