I do not actually know where they announce this release, but it has been available on the mirrors since 2010-03-10 according to their timestamps which shows about the same time this release was tagged in git. Besides the changes in the announce [1] it contain various fixes for NULL pointer dereferences and buffer overflows. Please bump the ebuild. [1] http://neil.brown.name/git?p=mdadm;a=blob;f=ANNOUNCE-3.1.2;h=321b8bef4fae8f9149295103ba9a55e8a5b6aa70;hb=a4b93c9ce4f15217afb811cd8c92a8b8f01124d0
now in the tree, thanks