I was playing Metal Gear Solid 3D, all fine until Gateway suddenly blacks out saying "The card has been removed, press Home blah blah". I dunno if anything is broken so I check the Micro SD just to be sure: all fine. I reset Gateway by going in my "Nintendo DS profile", then I start playing again and Metal Gear Solid 3D formats my data (like it usually happens to me every time I play a game for the first time). DANG, data lost. Thanks a lot. What happened, at least?