I havent played Ep 3 and that sounds really bad, there's no way to track down what happened or where the stuff went?
Probably some hack or something. A rare event, I'd guess.

i went online 4 the first time on ep1&2 then my characters got currupted thats wot i ment but then the same thin happend agian wen i went online 4 the second time with my new lv30 character bummer a so i m not going 2 go on the game un till i get the new non curruption mem card comes out :alien: :'(
Mad Catz 16X is your best bet. Saves fast, guaranteed not to corrupt and 1019 blocks of memory.

2 reviews say it can corrupt o_O
2 reveiws out of how many? lol I haven't corrupted yet.
Plus its not an official mem card, they work best.
Sorry to hear u corrupted

Over a period of 3 years...
Official Nintendo Memory Card corruptions - 5
Unofficial Mad Catz Card Corruptions - 0
cant argue with those numbers... though I know someone will want to...
Unofficial - twice
official - 0 out of my 3 official cards i have.
Well thats just how i see it anyway.