Dear Judges,
Effective immediately, “Cyber-Stein” is Forbidden for Advanced Format tournaments, and Limited for Traditional Format tournaments.
This change will be reflected on the web page later today.
We hope your players enjoy this holiday present from UDE & Konami.
Dan Scheidegger
Game Designer
Yu-Gi-Oh! TCG R&D
Upper Deck Entertainment

P.S.- Please send your Holiday wishes to "Cyber Twin Dragon", it's going to be a little lonely this season.
Sources:
http://lists.upperdeck.com/read/messages?id=11801
http://img.photobucket.com/albums/v243/ssjin4gogeta/asdfasdf.jpg
http://www.pojo.biz/board/showthread.php?t=378575