Since installing Dragonborn, I've been faced with two glitches...A search didn't turn up anything specific, so here you go. Apologies all around if this is a repeat performance.

Dagger Cases: ...It would seem that where the weapon is meant to be displayed, is no longer in the case in most Dagger displays. I try and put one in, and it will just warp to somewhere beside me, and fall to the floor.
-One of the weapon racks in Hjermarch Hall, Hearthfire, in the Armory Room, is also bugged as it will "Eat" your weapons. It's the Shield rack, on the northeast corner.

Mannequins: On two occasions now, I have stripped things off a Mannequin, to wear or otherwise, and I would return to find that some items have duplicated and are back on the mannequin, despite have the originals in my inventory.

Not game breaking, but it is definately annoying for those of us who enjoy displaying our spoils.