Yup, this happened to me and it brings back painful memories. I remember playing through FFVII the first time, getting up to (SPOILER)Gaea's Cliff, saving, and, , I pretty much had to start the game again. And THEN, when i got to (SPOILER)Northern Crater, My memory card screwed up again!!! grrr, anger. So i, unfortunately, ended up buying a new memory card..