Revealing mistake: When Hawkins is pulled into the lifeboat by Long John Silver, if you look closely, you will see that it is a stunt double who is doing the falling.
Revealing mistake: At the end, when the NYC children are rushing toward the peach to scoop out a piece to eat, you can see one little girl running with a piece of peach already in her hand.
Revealing mistake: When Joe is beat up the second time when he just gets off of the bus in NYC, during the simulated punches his head hits a sheet of Plexiglas. The makeup from his forehead leaves a tan stain on the Plexiglas.
Revealing mistake: When Eva is leaving with her suitcase, you can tell by the way she is holding the suitcase that she is ready to open it when it hits Magaldi.
Revealing mistake: At the start of the montage in which Frollo ransacks Paris for the gypsy girl, the shot of the three soldiers kicking down the baker's door very briefly places the more distant soldier off to the right "in front" of the closer central soldier; this is a case of incorrect animation cel layering.