In summer 2010 PopCap received a writing from Michael Jackson's administration of inheritance, asking to remove the so-called "Dancing Zombie", a hommage to Michael Jackson's portrayal from the music video of "thriller". PopCap did not resist at all and accepted the request. An update would replace the Dancing Zombie with the so-called Disco Zombie (still named Dancing Zombie in-game, but for clarification, the report keeps differentiating between the two). The following releases, for example the "Game of the Year"-Edition, would have the Dancing Zombie removed. The so-called Background Dancer Zombies have also been redesigned.