Audio problem: At the end after the President gives his speech in front of the White house, you hear the crowd cheering and clapping, but looking at the crowd, they are standing still, hardly in joyous uproar.
Audio problem: When Julie wakes up and turns the lamp on, and it goes off, Julie says "Shit" but her mouth says "ouch." (00:08:25)
Audio problem: After Will Smith's shoes had both been discarded when they found bugs in them, he runs down the stairs, but you can clearly hear shoes running down the stairs when he's supposedly not wearing any.
Audio problem: When you first see Stokely she says 'crash and burn, Casey' but if you look carefully you notice that her lips don't move with what she is saying.
Audio problem: Before Jackie puts on the Dutch shoes a woman with another pair of Dutch shoes is seen running away. A shot later she is seen walking away behind Jackie and you can't hear her shoes.
Audio problem: When Jim has been pushed out of the boat by Sheriff in the church, his voice is heard echoing "no" at exactly the same time that he is spitting water out visually.
Audio problem: In the scene when the plane slides down the hill into the water you hear the classic Hollywood sound used for jumbo jet engines dying out by hitting water. The problem lies in the fact that that engine would have been off by then, either by impact, or by the planes automated systems. Even if it was somehow still running you don't hear it until it dies.
Audio problem: When the gang are in the club and everybody is trying to persuade Mel to dance, Bobby opens his mouth and says "Dance Mel", but it's Melanie Griffith's voice that says the line.
Audio problem: In the beginning of the bedroom scene with Elise and her suspect client, the guy yells out "You let him hit me, I mean how can you let them hit me." But watch his lips when they first cut to him - they don't move until after he turns around. (00:40:00)
Audio problem: When Reese is in the chamber waiting to be gassed and singing "Time is on my side", the reflection in the glass shows him sitting totally stone-faced. His lips aren't moving at all.
Audio problem: When Michelle is taken inside by the gas station attendant, she thinks he is going to attack her. As she tries the locked door and he grabs her, we hear herscreams but her mouth doesn't match up to them. (00:06:35)
Audio problem: When Freedom shuttle is being destroyed by the asteroid field, you can hear Harry say, "Sharp, what the hell is that? Is that the Independence?" but you can tell by Bruce Willis' mouth that he isn't saying any of those words.
Audio problem: When the alligator bites on the fisherman's pole, the sounds heard don't match it biting on it.
Audio problem: After Smith yells "Where is my money?", his next line starts with "The Sedition...", but his mouth is saying something else.
Audio problem: Near the beginning, when the group are discussing the plans for the ambush, Sam asks, "Can you get me a simulator?" When Gregor eventually says, "Quite diverting" his lips fail to move as he speaks. (00:13:40)
Audio problem: Just after Quinn has been nailed to the wall at the beginning of the movie, he makes some strange noises and then starts talking in "vampire language." This has obviously been dubbed in post-production.
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.