After issuing multiple beta builds over the course of a month and a half, Apple finally released the much-awaited OS X 10.5.5 software update for Leopard (and Leopard Server) users. Addressing General issues (which include patching the latest security holes), but also improving Mail, MobileMe, iCal, Time Machine, Disk Utility and Directory Utility, the 316MB update is available for free to all existing Leopard users.