Audio problem: Near the end when the family have got back in the car Malcolm says something like "who would have thought a traffic jam could be so cool, we should do this again". Near the end of the sentence we can see Malcolm's mouth and it isn't moving.
Kill Me Now - S1-E3
Audio problem: When Lorelai and Rory are sitting at a table, with Rory looking at herself in a mirror, they talk about Rory's hair. Right after this, Rory asks, "do you want something to drink?" Her mouth doesn't move at all. (00:30:00)
Audio problem: In series 4 episode 9, "Sitting Targets", When Kenzo keeps crying it is a clear overdub.
The Accidental Text on Purpose - S9-E6
Audio problem: When Larry is in the dressing room with Lewis' girlfriend, she is heard saying "No, an accident is tripping...", but in the shot of Larry, she is saying different words than what we are hearing. (00:26:20)