User blog comment:Saratje/PC release date explained - Skyrim: Dragonborn DLC/@comment-82.42.68.143-20130112134337

"When the release date came closer and Bethesda had those issues with the PC adaption and PS3, they probably decided early on to release the build your own house content as a separate pack, Hearthfire"

You are aware that the game is CREATED on a PC right? Having issues with the PC version. The PC issues are VERY VERY easy to fix... Sounds like Microsoft have got a bigger hand in this than we all think.