Important changes are listed below.

• Dynamic PoS interest. Now it’s a function of PoS difficulty, nRewardCoinYear = 1 / (posdiff ^ 1/6). It can have values from 100% to 1%;
• Checkpoints ignore option added, disabled by default;
• Bug fix for coinstake transactions display in QT client;
• Bug fix for AvailableCoins function, prevents immature coins usage;
• Mac OS X compatibility issues resolved, from now we publishing official Mac OS X 64 bit builds also;
• New genesis block for testnet.

Update should be performed before 20 June 2013.