Even though it's supposed to be night the first time in Jeffrey's attic, sunlight can clearly be seen coming through a roof fan above.
Bill Snyder's name is misspelled in the opening credits as Synder, but correctly spelled in the closing credits.
The composer Edvard Grieg who wrote In The Hall Of The Mountain King is misspelled as Edward.
In the disclaimer, "actual events or persons" is misspelled as "acutal".