I made a new world last night, and played for about an hr and half. I loaded up Minecraft this morning and went to resume working on it and the world is gone. No listing at all appears for the world. Like it was never even created. I made sure I exited the world like I always have and it even showed the icon for autosaving in the top right corner while i was playing and exiting. This really needs fixing. I haven't played minecraft for months before this and now this is what I come back to. Not cool.