[greenalert][/greenalert] Gavin Andresen , Lead Core Bitcoin Developer posted today on Bitcoin Talk Bitcoin-Qt/bitcoind version 0.8.1 is now available from:This is a maintenance release that adds a new network rule to avoida chain-forking incompatibility with versions 0.7.2 and earlier.Please report bugs using the issue tracker at github:How to Upgrade--------------If you are running an older version, shut it down. Waituntil it has completely shut down (which might take a few minutes for olderversions), then run the installer (on Windows) or just copy over/Applications/Bitcoin-Qt (on Mac) or bitcoind/bitcoin-qt (on Linux).If you are upgrading from version 0.7.2 or earlier, the first time yourun 0.8.1 your blockchain files will be re-indexed, which will takeanywhere from 30 minutes to several hours, depending on the speed ofyour machine.