The movie was scheduled to have its world premiere at the Montreal World Film Festival in August 2005 but it got pulled due to the controversy generated. Since then some of the rape scenes of the teen girls have been removed for the 2006 theatrical release in order not to break any Canadian child pornography laws.
Several frames of nudity removed from the rape scene of Karla's little sister Tammy have been restored on the European and North American DVD releases.
In some versions, during the epilogue right before the end credits, there's an extra one that reads "Her IQ has been measured at about 132, signifying very superior intelligence".