When i was going to go into college, i saved my game like normal but i forgot to close the software...that really got my OCD going about game corruption now.. i started it up again later and found out about it but then my game was safe. Phew!
i don't remember what i did before but once i opened my 3ds and it starting saving then it quit and went to the title screen. like i said, i don't remember what happened but i kept asking myself if i really really save&quit and closed the 3ds right away. what wrong with you luigi! what if you save/quit and pressed the power button instead!