"Vista is made for dirty."
That's According to Kotaku and retailers in Akihabara, Japan, that's what customers are sure about.
Shortly after the release the store put up posters that informed customers that Windows Vista is very much compatible with Erotic PC Games.
I'm guessing the blurred out screenshots helped to entice users to upgrade their OS to Vista for the carnal compatibility ^_^
If you can read Japanese, here's the source.