From ZDNet UK: "Sony has forced a programmer to remove from his Web site code that changed the behavior of its Aibo robot dog.
According to a report in New Scientist, the programs gave Aibo new functionality. One, called Disco Aibo, made the robotic canine dance to music.
Sony protested, saying that the applications used proprietary and encrypted code. The Japanese company demanded the removal of the programs, along with details of Aibo's software protection."