Audio problem: In the scene where Charlie is handing the girls their wine, Bill is speaking to his buddy, asking him if he likes his coat. Watch his mouth, the spoken words do not match his lips. (00:15:30)
Audio problem: In the scene when Josh (as Tom Hanks) comes back to his house to talk with his Mother for the first time since becoming "big", she starts screaming and backs away from him. She backs into the piano she says "Go away, go away." but her lips don't move at all. (00:16:45)
Audio problem: Right at the scene where Reggie Jackson points the gun at the Queen, Drebin fires a shot off at him from his watch. It goes astray, hitting some fat lady, and we hear him saying "whoops!" but his lips don't move. (01:16:10)
Audio problem: In the scene where Kalgan confronts third engineer Steve Godell on the catwalk, he laughs before saying the line: "third engineer Steve Godell?" The laugh begins while Kalgan is obscured by the set, and continues as he moves into the scene. As he steps from around the corner, you can see his mouth is closed and not moving at all, despite the fact that his laugh can still be heard for 3-4 seconds.
Audio problem: 99% of Mooch's drumming is not in synch with the drumming sounds, especially the ride and crash cymbals.
Audio problem: When Tess meets up with her boss toward the end at the helipad, notice that the helicopter engine sound is playing, but the props aren't turning. Helicopters blades always turn if the engines are running, just like an airplane.