Audio problem: While Claire is lying down, just after she says, "Our only hunter's gonna get eaten so he can get the pregnant girl some more water," we hear Charlie say, "I wouldn't worry about that," but his lips just begin to open mid-sentence, and he certainly doesn't say that.
Audio problem: When Sayid and Essam sit in the truck with explosives, Sayid says, "Her name is Nadia, they know where I can find her," and in the shot facing Essam, when he is done with that line Sayid's mouth continues to move, but nothing is heard.
Audio problem: When Desmond, Locke and Jack are standing outside the cave with light, Desmond says "maybe I can find a way out for you too," or something like that. Jack replies, "there are no do-overs." The camera then goes to over Jack's right shoulder as he says, "I tried that once." However, the words don't match what his mouth is saying.