This incident had nothing to do with zero-conf txs. In fact okpay did wait for multiple confirmations, and was still hit by this $10k double spend! This whole

This incident had nothing to do with zero-conf txs. In fact okpay did wait for multiple confirmations, and was still hit by this $10k double spend! This whole thing was possible because of an accidental fork of the chain which lasted a few hours. This is the only accidental fork that occurred in the last 3 years. Details: https://github.com/bitcoin/bips/blob/master/bip-0050.mediawiki https://github.com/bitcoin/bips/blob/master/bip-0050.mediawi...