Continuity mistake: The scene where Ana goes to her father to ask for a loan for Estela's factory, each time the camera comes back to Ana, the shadows in the background change.
Continuity mistake: Throughout most of the film you can see the bulge of John Cusack's supposedly missing arm through his coat.
Continuity mistake: When Dahmer gets upset and tries to tackle the wrestler, he is thrown on his back and grabs the guys shirt. The shots after that switch between holding the shirt and not holding the shirt.
Continuity mistake: Uma Thurman carries her screwdriver while she dances in Ollie's bar trying to attract Justin Chambers. During this scene her glass goes from one quarter full to three quarters full.
Continuity mistake: In the scene where Trish gets shot in the head by Vic, she falls backwards onto a bed and lands inbetween two duffel bags. When Jack looks over to her, the camera shows her again, and the bag that was at her right is no longer there.
Continuity mistake: At the beginning of the movie, Sam tries to shut down the bomb. The timer reads 24 seconds. When he discover that he can't, something like 1 second later, the timer reads 19 seconds.
Continuity mistake: When the team has their first game against the old guys, the first shot by the lead is wrong. Watch carefully and you will notice that the direction of the rotation of the stones changes about three times from clockwise to counter-clockwise during the same shot.
Continuity mistake: In the animated sequence, just before the kids destroy Sister Assumpta's office, Skeleton Boy's cast remnants switches from left arm to right arm and back to left arm. The left arm is the correct side as Tim (who is Skeleton Boy) had his cast on his left arm. (01:20:00)
Suggested correction: Your observation is correct, but this isn't necessarily a "continuity" error. The nature of comics or cartoons lends itself to imagination, creativity, humor, etc. Drawing comics is less tedious these days, thanks to computer programs and "cut and paste" techniques; the chances of a cast accidentally placed on the wrong arm are slim to none. Skeleton Man's "drawing" has many inconsistencies - number of ribs, teeth, finger bones, EYEBALLS or dark holes - with comics, it doesn't really matter.
Continuity mistake: When sitting around the table with her friends, the book Katie is holding changes between shots.
Continuity mistake: John's shoes change from the time he gets out of his car the first time at Gordon's house to when he's inside the house in the bathtub.
Continuity mistake: Ben is happy because he made the team. He sees Stephanie on the sidewalk, reading. He approaches her; she says "Oh hey, Ben!" closing the book twice and in different ways. (00:13:55)
Continuity mistake: At the beginning of Deuces Wild when Leon stands up off the street and directs his attention to Marco, you can hear torrential rainfall out in the street, yet as the street light shines on Leon, his face is near perfectly dry. (00:01:30)
Continuity mistake: Antonio Banderas looks at his watch and the time is increasing, but a minute later he looks and the time is counting down. (01:07:40 - 01:08:40)
Continuity mistake: There's already drops of blood on the floor and Carrie's hair is already wet before the blood hits her.
Continuity mistake: When Davey, Whitey, and Eleanor are at the skating rink, in one shot Eleanor's green earring is quite small and in her hair, not on her ear. Then in the next shot, the earring is bigger and in the proper place.
Continuity mistake: When Craig Ferguson approaches Marie on the cable car, Caroline Ducey is holding her copy of Le Monde in a different way between shots - her right hand moved down and the corner that was crumpled is now straight. (00:07:50)