10.5.6 here snappieness ensues
9to5mac.com/2008/12/15/10-5-6-here-snappieness-ensues
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
10.5.6 is out, go grab it from Software update (377mb here!) or via the standalone installer.