Who hacked Mt.Gox? The leak contains some clues. A visit to the above-mentioned mirror brings a link to the zip file and a note: I hated working with you. You deserve everything you get for what you did.
Worth mentioning there's a wallet stealer in an .exe file in that database dump..
Could be the original hacker thief that is auctioning customer id papers on another thread here, that also leaks the accounting info to get more suckers separated from their coins?
Nevertheless the leak is interesting.