[dkns]

IIRC this: http://www.coindesk.com/understanding-dao-hack-journalists/

tl;dr dude stole coins from ethereum creators, they decided to fork it

"A software fork has been proposed, (with NO ROLLBACK; no transactions or blocks will be “reversed”) which will make any transactions that make any calls/callcodes/delegatecalls that reduce the balance of an account with code hash0x7278d050619a624f84f51987149ddb439cdaadfba5966f7cfaea7ad44340a4ba (ie. the DAO and children) lead to the transaction (not just the call, the transaction) being invalid …"