So you're going to "rollback" those who have already withdrawn to their personal wallet then?

Some people who withdrew to their wallets still have enough to cover their withdrawal in their account. For example, if I had 1000 bitcoins, made another 2000 bitcoins during the crash, then withdrew 500, after the rollback, I'll have 500 left. (The original 1000 - the 500 I've withdrawn).
Some peoples' accounts might be 'negative' because of withdrawals. Mt gox will have to cover these losses if the users don't return the funds. I'm sure it isn't that much.
I'm sorry but this is a laughable solution in my opinion. Mt. Gox needs to cut their losses and compensate this alleged owner of the original alleged user account that was allegedly compromised.
If you expect people to take Mt. Gox seriously when their account balances go negative, then you're just as crazy. Mt. Gox does not control the exchange rate and they will no longer be a central exchange. They cannot dictate market value of the BTC any longer.
If you withdraw more than you have, your balance goes negative. I doubt anyone with a negative balance will return it when they can just open a new account, but that is just how math works. I don't see what is laughable. If you had 1000, and withdrew 500, you have 500 left. This isn't a "solution" this is the way numbers work.
And how could they "cut their losses" by coming up with 400,000 bitcoins. I don't even think there are 400,000 available for purchase. The price would be more than they can afford. When you "cut your losses" you are supposed to lose less, not more.
lol... nvm