Audio problem: When the Geckos shoot Chet Pussy, the sounds of gunfire don't match the visible gunshots. (01:00:25)
Audio problem: When Andy says to Debbie "How do we do it in a hammock?" his mouth doesn't move to the word 'hammock.' (00:46:05)
Audio problem: When Emily picks up the tooth from the box, she says "ew" but if you look in the mirror her lips don't move.
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 scene where Rose is talking to the demonic form of Alessa, watch her mouth as she says "Christabella will find Sharon." Alessa's mouth doesn't match every word she says.
Audio problem: When Daniel is on top of the tree house, his screams don't always match up to his mouth. (01:23:20)
Audio problem: Buddy drives a manual truck, but when he goes around a corner, we can hear the truck's gears changing. Buddy's arm stays glued out the window, so he can't be changing gears.
Audio problem: When the CT technician asks John if he'd like some help getting down, John says "Thank you very much", but you can tell that he's not saying anything and that the line is just dubbed in. (True, the camera is facing away from him, but his jaw and face aren't moving at all.)
Audio problem: At the end, as Dax rescues Sahara and loads her into the evac shuttle, he steps away from the craft. Bugs are swarming the scene, but it is apparent that Dax is staying behind. Sahara cries out, "You stay here, you die!" and we hear Dax reply, "Murderers don't go home," which is an overdub. His mouth visibly says something very different with several more syllables.
Audio problem: During the final test, at one point Marcus says "Shoot this piece of s**t Ezekiel, now." In the first shot, it's clear he's saying something entirely different as his mouth movements don't match the dialogue. The scene then cuts to a closeup mid-line, and the closeup does match... but the first shot doesn't match in the slightest.
Audio problem: When Ben shoots at the shark, he falls backwards and pulls no trigger, yet bangs are heard.
Audio problem: During the scene right after Anton runs into the scarecrows in his house only to find out they are his deceased mom and dad, you see him run out to his porch and begin throwing up into his bushes. You can hear the sounds of liquid hitting the bushes, but you see nothing coming out of his mouth (there is enough light in the film to determine this).
Audio problem: After Moose Matson is shot in the cop and car chase, Moose Matson, says, "Pull over, will ya?," but his mouth isn't moving.
Audio problem: In the scenes inside to cabin where Angela keeps her victims you can hear flies, but there are no visible flies anywhere.
Audio problem: When Dina says to Ryan that she didn't love Brad, just him, there is one point where she says, "No, I never did." When she does, her mouth does match up for the word "No" but not for the rest. (00:06:05)
Audio problem: In the motel, the police are unnerved by a giant, deadly moth-creature banging against the window panes, and they open fire with everything they've got at a range of about ten feet. Strangely, we only hear gunfire sound effects when the camera is looking directly at the police officers firing their weapons. When the camera repeatedly cuts to close-ups of the window (to show the ongoing damage), there are no gunfire sound effects, even though we see and hear the window still popping and shattering under the hail of bullets. This same, awkward, delayed-gunfire sound editing occurs elsewhere throughout the film, as well.
Audio problem: In the opening scene, when Christian asks young Elise "How did you know that?!" after the talks about the man who was just executed, his mouth isn't moving. (True, he's out of focus in the background, but he's not speaking).
Audio problem: When Kurg gets bitten, his mouth does not match his screaming.
Audio problem: When the mysterious lens flare creature possesses the microwave oven, its door opens with a disproportionate "creaking door hinges" sound effect. Inherent phoniness aside, the noise is also continuous, but if you look at the door, it did not open in one fluid motion; the actor's pelvic thrusts as he was boinking the stewardess got in the door's path for a moment putting it to a momentary halt. (00:14:05)
Audio problem: When Patrick Bateman is exercising and watching The Texas Chainsaw Massacre, the audio does not match up with the actual film. (00:37:05)