According to the "leaked" document:

At this point 744,408 BTC are missing due to malleability-related theft which went
unnoticed for several years. The cold storage has been wiped out due to a leak in the hot
wallet.

Bitcoins:
Assets: 2,000 BTC
Liabilities: 624,408 BTC(Customers) +120 000 ( MtGox) - 80 208 BTC (banned/suspicious accounts)

Fiat:
Assets: 22,430,000 USD in bank + 5,000,000 Coinlab + 5,000,000 DHS
Liabilities: 55,000,000 USD (but still unclear)

Total Assets: 32,430,000 USD + 2,000 BTC
Total Liabilities: 55,000,000 USD + 744,408 BTC


So basically, there is a deficit of 744,408 BTC and $22 million+ (assuming unrealistically that the $5 million being held each by Coinlab and DHS will be returned to Mt. Gox customers)

If you're running Mt. Gox and are honest, kind of hard not to notice that 744,408 BTC is missing and that you owe your customers over $32 million+ and not say anything?

Wasn't there a post in which (Roger Ver?) supposedly examined Mt. Gox's books only a couple of months ago and even he wanted to buy insider Mt. Gox bitcoin at a slight discount? Please correct me if I'm wrong, but he is very well respected so perhaps he was shown fake balance records?

If the 744,408 was stolen suddenly, it would be easy to trace. But it was most likely siphoned off incrementally over time making it harder to trace. The missing fiat is still puzzling.