HP12 released! The download links are on the first page as usual. Since people keep running into the bugs in older releases, I have finally decided to make a new release. This is a recommended upgrade for all users. Note that this release does not contain my very latest experimental optimizations. Nevertheless, many smaller optimizations and improvements are included.

Release highlights:
 * Fix for shared wallet files. If the same wallet.dat file is copied to multiple machines, they should all try to solve unique blocks now.
 * Fix for getwork protocol. Some versions of jhPrimeminer support solo mining using a patched getwork protocol. That patch is included in this release.
 * OS X binaries of the Qt client.
 * Fix for the assertion failure crash.

Changes:
 * IMPORTANT: Fix for multiple machines doing the same work if wallet is shared.
 * New chain statistics in debug.log.
 * Removed 'primespersec' from the output of getmininginfo.
 * Removed 'chainspermin' metric.
 * Replaced -sievepercentage parameter with -sievefilterprimes.
 * New parameter -l1cachesize for specifying the size of sieve segments.
 * Added new blocks/day metric which tries to estimate how many blocks will be found at current difficulty.
 * Better automatic adjustment of primorial factor.
 * New parameter -primorial for manual adjustment of primorial.
 * Implemented early support for v0.2 proposal (needs to be enabled with -miningprotocol=2).
 * David's fix for getwork.
 * Updated to Bitcoin v0.8.6 codebase.
 * Improved the checking of BiTwin chain candidates. As a consequence, short BiTwin chains (1 or 2 primes) are now counted correctly in the mining statistics. Primes/h is now much higher due to this.
 * The Qt application is now titled Primecoin High Performance.
 * Fixes for Mac OS X and the Clang compiler.
 * Revised default sieve parameters.
 * Added an automatic donation feature when a new block is found. The -donationpercentage allows a percentage of the block reward to be donated to an address. E.g. passing the command-line parameter -donationpercentage=1.5 will donate 1.5% of every block to the developer. Alternatively, this value can be set in primecoin.conf. Also, the default address can be changed using -donationaddress.