I bought hearthfire for the pc today and have thus far enjoyed it but I did manage to find a bug with one of the doors on Lakeview Manor. I had planned on making this my primary home and this is only a minor bug, seeing how many doors are capable of being put on the house.

Anyway the bugged door is on the North Wing's Storage Room Balcony door. You can leave the house through the door from the interior however on the exterior the door seems to be clipping with the wall and is completely uniteractable.

Not sure if this occurs with any other house.