The US theatrical version had a few seconds of violence cut (including one shot of Drew Barrymore spitting blood) — the theatrical cut has been released in pan-and-scan as the PG-13 DVD. The widescreen DVD has those seconds restored, and is touted as "unrated". The Region 4 DVD version includes this footage.
The UK version has had a headbutt removed. We have confirmed that this headbutt is present in the Region 4 version.