Version 0.3.13 is now available. You should upgrade to prevent potential problems with 0/unconfirmed transactions. Note: 0.3.13 prevents problems if you haven’t already spent a 0/unconfirmed transaction, but if that already happened, you need 0.3.13.2.
Changes:
Download: http://sourceforge.net/projects/bitcoin/files/Bitcoin/bitcoin-0.3.13/
(Thanks Laszlo for the Mac OSX build!)
Note: The SSE2 auto-detect in the Linux 64-bit version doesn’t work with AMD in 64-bit mode. Please try this instead and let me know if it gets it right: http://www.bitcoin.org/download/bitcoin-0.3.13.1-specialbuild-linux64.tar.gz
You can still control the SSE2 use manually with -4way and -4way=0.
Version 0.3.13.2 (SVN rev 161) has improvements for the case where you already had 0/unconfirmed transactions that you might have already spent. Here’s a Windows build of it: http://www.bitcoin.org/download/bitcoin-0.3.13.2-win32-setup.exe