I have personally noticed that when I pickpocket someone for the first time, sometimes they will have a book or an item. while attempting to pickpocket, I would get caught (sometimes on extremely stupid common double nat 1's which are way too frequent), and thus load a saved game. Upon reload, certain items, specifically books at least, disappear. At first I though that the first time you pick a pocket, they had a chance at random items. However, in non of my reloads from multiple targets did I ever see the books again. Over the last few weeks, other players that I have played with are saying the same thing. that they pick-pocketed, saw an item (Book), then reloaded, and the book was gone. As stated, this has happened with many NPC's and can be tested easily with a new game. The latest for me is Auntie Ethel. The first time I went to steal something from her, she had no visible empty slots in-between other items, but upon reload there are two items missing that were there before. I honestly don;t understand how a reload would delete items from the inventories of npc's after a unsuccessful pickpocket... because the pickpocket never took place in the reload.........