Apple released a new update to Apple Mac OS X Leopard.
The Mac OS X 10.5.2 Combo Update is recommended for all users running Mac OS X Leopard and includes general operating system fixes that enhance the stability, compatibility and security of your Mac. The new OS X update fixes issues across the board. iChat, Finder and Mail are amongst the applications with the most fixes.
To install, choose Software Update from the Apple menu to automatically check for the latest Apple software using the Internet, including this update.
Via the Apple Support site.