Treasure Bug
Every time you find a chest, and your looking for a specific item, or item type. (eg. armor, wep,boots etc..) Press f9 to quick save, and then lock pick, or open the chest, if you don't like what is inside then reload the game.
Note: If you find a good item you really like, but not what your looking for, save it under just in case its the best thing you find.