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 …"
It's seen as some as an admission that the Ethereum ethos of "the code is the contract" is unrealistic.
Sure sounds like a hack to me.
I am also not up to date on the cryptocurrency du jour, but I believe this is in reference to the current civil war going on in BitCoin about the block size. [0]
Basically the majority of mining power will decide which proposal is selected going forward. I only follow BitCoin tangentially, but I believe a majority of mining power is concentrated in a few mining pools, themselves controlled by a few people. So in reality "decentralized" really means "whoever can organize the biggest army"
[0] http://www.investopedia.com/terms/s/segwit-segregated-witnes...