So after buying "decorations" for my house, i decided to take all the junk off the shelves and tables and make my Whiterun house all cozy and whatnot. After about an hour of organizing ( by organizing i mean thrashing the item all over the walls, floors, and dressers to get the item upright ) my weapons around the house and dwemer dishware on the tables, i leave and comeback to what looks like someone blew a fire rune in my house. I give up decorating my house the way i want, im thinking of resorting to inns the rest of my days. This is more annoying than the over-filled loot sack.. Talos take me now.
I leave Lydia in my Whiterun house and I swear to god, she eats the food and nudges stuff.
Items you set out for display are also incredibly sensitive to any little shock in any area of the house. I gave up on trying to display a nice pile of gold bars on the doorside table because they would invariably be jarred onto the floor by the simple act of going upstairs.
Also, I've discovered the blacksmith from Warmaiden's leaving my house once or twice. Not sure what Lydia's up to with him, but I'm positive it doesn't help any of my decorations.