What happened was I broke a jukebox with a diamond axe with the efficiency V unbreaking III enchantments and I got disconnected from a 1.4.6 server I was hosting. Then I logged back on, and the chunk I was standing in got reloaded, deleting most of my house with all of my things in it. So it was chunk loading glitch. The picture is taken in creative mode, as I was getting ready to rebuild my house, but it was a survival map.