User blog comment:Blood Reaper/Skyrim 1.5 Update + Video/@comment-3338515-20120321041413/@comment-4020664-20120321171622

I had the same problem on a 300 odd hour playthrough, culminating in me starting a new save after having all player housing become inaccessible. I tried a lot of stuff to fix it, but I couldn't in the end. This was on 360. The only thing I can advise is starting a new save.