Revealing mistake: During "Never Say Never" Henri instructs Chantal to fly Fievel to immigration where he should be able to find his family. At one point during this shot, Henri's right wing casts no shadow on the Statue of Liberty - only an outline of the wing's shadow is visible. (00:23:25)
Revealing mistake: When Ed Rooney walks up to the girl in the arcade, he wouldn't have known it was Ferris, as he'd only seen him in the grey coat and hat outside the school when he was picking up Sloane Peterson.
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Suggested correction: Odds are very good that Ferris has worn that particular jacket to school regularly. Rooney would have seen him in it.