http://newslines.org/mt-gox/joins-linux-cyberjoueurs/
http://newslines.org/mt-gox/convicted-of-computer-fraud/
Again, what ultimately convinced me of Karpeles' character is that he paid his IRC support staff to lie to users. The support staff didn't realize they were being paid to lie, but they were certainly lies. They were being paid to tell users, "Yes, all of your coins are safe and secure" while Karpeles was drafting his Mt. Gox crisis report: http://www.scribd.com/doc/209050732/MtGox-Situation-Crisis-S...
Once Mt. Gox was hacked in the aftermath, a log of their trading activity was leaked. In that log, there's evidence of an Mt. Gox trading bot that had been operating for a long time, buying up bitcoins in order to inflate the price.
http://willyreport.wordpress.com/2014/05/25/the-willy-report...
https://news.ycombinator.com/item?id=7796748
At this point, I don't think Mt. Gox or Karpeles deserves any further attention, except as a warning that even the largest Bitcoin exchange can fail, which is why you must store your bitcoins in your own secure wallet, not any third party service.
EDIT: Also, Mt. Gox lost at most 386 bitcoins to malleability: https://news.ycombinator.com/item?id=7482451