User blog comment:Saratje/PC release date explained - Skyrim: Dragonborn DLC/@comment-62.116.220.154-20130111150306/@comment-81.144.132.166-20130111154948

Didnt say there were, but apparently someone has created a patch for dawnguard on ps3 so that it works but Zenimax allegedly put a stop to it cos it made them look incompetent which is uppose it does.