Audio problem: When Harry and Lloyd pick up the hitchhiking natives, when they were playing the mockingbird song, the guitar was playing but his hands weren't moving at all. (00:40:38)
Audio problem: In the very beginning Lloyd opens a bottle of beer in their apartment. When the cap falls on the floor it makes a clinking sound as if it landed on tile, however, their floor is carpeted.
Audio problem: Just before Lloyd and Harry set out for Aspen on the mini bike, they clumsily attempt a high five. At this point Lloyd asks Harry if he still wants to go to Aspen, but when he says, "Oh yeah" his lips are forming altogether different words. (00:55:00)
Answer: This is a scene that was cut from the theatrical release of the film, but is present in the extended cut and some international DVD versions.