This release introduces a new network rule: “a block is not valid if it contains a transaction whose hash already exists in the block chain, unless all that transaction’s outputs were already spent before said block” beginning on March 15, 2012, 00:00 UTC. It adds various bug and security fixes, UPnp improvements, and a new checkpoint at block 168,000
Bitcoin 0.5.3 发布，匿名数字货币
Bitcoin 0.5.3 发布，Bitcoin是点对点(peer-to-peer)基于网络的匿名数字货币。点对点(peer-to-peer)的意思是指没有中央权威控制货币的汇款通道。相反，这些货币转帐的任务是由网络节点进行的集体管理。匿名就意味着交易各方可以隐藏自己的真实身份。
新版本改进内容：
This release introduces a new network rule: “a block is not valid if it contains a transaction whose hash already exists in the block chain, unless all that transaction’s outputs were already spent before said block” beginning on March 15, 2012, 00:00 UTC. It adds various bug and security fixes, UPnp improvements, and a new checkpoint at block 168,000