Is there any proof that mtgox had a total of 850k btc in hot and cold storage? I do not consider the hacked mtgox data as a proof here because the data could have been modified in order to present a larger total (btc or fiat) balance. I believe that any information is leaked is in purpose and MK is responsible for the leaks.

More the amount of btc or fiat that Mtgox claims as lost, less the percentage that Karpeles pays back to gox customers.