The Witcher 2 has reportedly been censored ever so slightly for Australian audiences. Games On Net notes that for its MA 15+ rating the titular Witcher can't accept sex as a reward for completing a side quest. Namco Bandai, the game's Aussie distributor, apparently felt that receiving sex as a reward was not suitable for the game. The quest and NPC are still in the game, though the outcome has simply been altered. That's promised to be the only change made for Aussies.
Contacted for comment, a representative for developer CD Projekt told us the company will apparently make a statement about the situation tomorrow. Australia is expected to finally resolve its lack of R18+ rating in a meeting of the attorneys-general this July.