Plot hole: After Little John bores a hole in the bottom of the treasure box, several gold coins fall through the hole. The four rhinos holding the box should have noticed it becoming lighter.
Plot hole: Webster meets Laura at a party and she takes him to her house - it's not really her house - and says he has to break in to show off his talents, but when Webster does break in, he walks into a pitch-black house and he walks straight to the light switch and turns on the lights, so Laura can come in to a lighted house. Problem is: Webster has never been to this house before, it's pitch-black inside (it's so dark we can't see Webster at all), and the light switch is not where most switches are - on the wall next to the door - it's on a pillar, which is really far away from the front door; there's no way he'd be able to go straight to it.