Audio problem: Regardless of what he has on his feet, every time Gekko walks there is the sound of shoes on the floor, even when it's clear that he has socks/sneakers on.
Audio problem: When Maximus is eating with Juba and Hagen, just before he fights Tigris of Gaul, listen to the background noise very closely as the men talk. There's lots of chatter and stray noises, but amid the sounds you can hear someone yelling urgently: "Warren, Warren... Warren...radio." This may be the sounds of a crew member telling another regarding a radio. (01:36:30)
Audio problem: At the beginning of the movie when the employees start singing after Mark puts his song on, Renee Zellweger is supposed to be singing while she wipes the CDs but you hear her singing and her mouth is not even moving.
Audio problem: When Bud is yelling at his sister in the school hallway by her locker, she complains about girls not being happy in poodle skirts and sweater sets. When the camera's point of view switches, her mouth is still moving even though she's stopped talking. (00:37:00)
Audio problem: When singing Reproduction, a boy sings "Oh I think I'm gonna throw up"; yet he sticks his finger down his throat and keeps it there until the line is over, never closing his mouth; how did he make the 'p' sound on 'up' without closing his lips together? The words are pronounced very clearly and the camera doesn't cut from his face until after the line is done.
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: Terri takes her friends out to a restaurant, and she starts singing a song, and where she says, "The way you swept me off my feet," her mouth doesn't move at all.
Audio problem: When Doug is staring at the terrorist and says, "I can see him, he's right in front of me", you'll notice that his mouth moves a little before words are actually said. This is because he first says "Jesus", but they took it out because the character playing the terrorist is Jim Caviziel, who played Jesus in Passion of the Christ. The filmmakers did not want to get a laugh out of that line which it inevitably did in test screenings. (01:06:10)