Since many of the jokes in Love Hina revolved around Keitaro Urashima's supposed "pervertedness", and other awkward sexual situations, the dub version toned down the dialogue and changed the anime series in subtle and not so subtle ways.
In the Christmas special Love Hina DVD, there is a special Episode 25. Motoko's sister returns, there is nudity of Motoko and Naru (mostly Motoko, Naru's is only seen if you look closely due to the hot springs' smog).