So how did this lucky SOB get the unhashed server seed?

Did somebody at Stunna's HQ 'leaked' the seed to this guy? Very likely, yes?

Stunna will share the details later this week, and we will soon know how it happened and what went wrong.
It's a pretty complex situation, we put in a basic fix which was defeated and now we're taking stronger measures to ensure this doesn't happen again.
Part of fixing the issue is forcing all accounts to set a new seed pair, in an hour expect to be prompted to set a new pair.
I'll be providing full information later this week after we've done some extensive testing. I am comfortable saying that there was no breach of server or database and all account balances are 100% safe, no accounts should be effected by this issue it only effects us.