The first part of lead character name Charles-Ingvar 'Sickan' Jönsson is misspelled as "Charel" in the end credits.
On the digitally restored version the red pieces of the Lego model have turned orange, a Lego color not introduced until 1998.
When Charles mistakes the reflection a glass pane for a window and absentmindedly says "There's apparently a fire at the neighbors'", Ulf Brunnberg cracks out in laughter and turns away to hide it.