If a real stockbroker lost funds like that, and became insolvent (debts > assets), they would have to stop operations immediately. In some jurisdictions it is a felony for a broker to continue to accept funds once insolvent. They don't get to "fix it later". That's because, historically, the temptation to fix it by speculating with customer funds has been a big problem.
With withdrawals working again, it's probably a good idea to get your assets out of Bitstamp. Don't use them as a wallet. Trade there if you like, but empty out your account when not actively trading.
Bitstamp now needs a full audit by an outside auditing firm.
Agree, that's the missing part of the statement - how are they going to cover the lost funds? After all the shit from Mt Gox it would be nice if bitstamp were more transparent on this.
Although, if Pantera bailed them out, both sides may not be very keen on disclosing the details. And this part slightly suggest that this could be the case:
Hopefully they won't qualify for audit exemption in their 2nd year of trading.