Continuity mistake: At the end of the movie, when Robert has been resurrected as a tricycle, the bell and ribbon keep moving back and forth from the right handle bar to the left one.
Continuity mistake: In the beginning, when Billy is talking to the bum (who later turns out to be Tawny), the bum has a glove on his right hand. When he reaches his right hand out to Billy and Billy gives him a subway token, there is no glove. It's back in the next shot.
Continuity mistake: When Gulliver is talking to Darcy, his lanyard goes from being blank to having words between shots.