Audio problem: During the chase scene at the science museum, there is a shot where an FBI Agent reports on a disturbance there. If you watch closely, you can see where he originally said the "Smithsonian", and the audio was dubbed to say "science museum". (01:08:20)
Audio problem: When Charlie is driving the truck, you see her press the brake, but you hear the engine rev.
Audio problem: Right after the final buzzer, Julie the Cat skates out of the goal and pushes off her helmet, yelling "all right". She's smiling and her lips don't move.
Audio problem: When Bob runs from Vanessa, out of the car after being shot, Vanessa shoots her gun, and we see the bullet hit the floor, with the audio of gunfire to match it. Then audibly we hear Vanessa shot the gun two more times, however visibly three bullet-holes appear in Bob's brown coat, so they forgot the audio for one of the bullet-fire, also revealing that Bob was probably wearing squibs.
Audio problem: In the scene where Jerry and Dorothy are having dinner at a restaurant, Dorothy leaves the table to make a phone call. While she is on the phone the Mexican musicians come over to Jerry and start playing music at their table. At one point, the shot is on Jerry with the violin player standing behind him. In the song they are playing you can hear the sound of the violin playing, but at the same time the violin player standing behind Jerry drops his violin and is holding it at waist level while the song is still playing. Since he is the only violin player there is no way we should still be hearing it in the song.
Audio problem: Just before Sally Field screams about the smell being washed out of her daughter's pillow, take a look at the little girl eating breakfast. She tells her father that she doesn't like bananas but you can tell she said something else and then laughed and said "I mean." while trying to hide her laughter. Although it was an obvious mistake she did a good job of covering it up.
Audio problem: Nancy shouts, "Yay Chris! Go long! Go for the pass, baby!" at football practice, and her voice is so distorted that the viewer can easily tell the line was added post-production (with too much gain).
Audio problem: In the fire scene, Rochester is barefoot when he puts out the fire, stops to put on his pants, but you can hear that he is wearing shoes when he walks away. (00:49:00)
Audio problem: When Cole says "Boring" during the end fight scene, his mouth does not move.