Continuity mistake: In the shower scene where the soaps are dropped, what Larry is holding changes constantly. He goes from holding a white tube of something, to holding what appears to be a green shampoo bottle, to digging in a zippered case with his stuff in it, back and forth and around, several times.
Continuity mistake: When Alex runs her cart into Chuck's cart at the store, Alex is reading a book with her glasses on. The camera shoots the carts hitting each other, then Alex talking to Chuck (with her glasses on), then Chuck talking to Alex and back to Alex without her glasses. The rest of the scene is shot with Alex's glasses hanging in the middle of her shirt. They never show Alex actually removing her glasses and hanging them.