http://www.appleinsider.com/articles..._7_update.html
Apple this week is believed to have tapped its vast developer community to begin testing Mac OS X 10.5.7, a sizable maintenance and security update to the company's Leopard operating system with a particular focus on syncing improvements.
Those people familiar with the matter say the update, like those that came before it, will bundle a plethora of bug fixes spanning a wide range of system components and services. In its current pre-release form, the software reportedly boasts nearly six dozen code corrections and weighs a hefty 440 megabytes in barebones form.
In particular, Apple is said to be focusing on syncing issues that have plagued many of Leopard's standard, forward-facing apps, such as as Mail, AddressBook, and system preferences. A problem with Safari not accepting certain types of cookies will also reportedly be addressed.
Among the nearly two dozen other components receiving attention in beta of Mac OS X 10.5.7 are graphics drivers, Time Machine, printing services, screen sharing services, MobileMe syncing, AirPort services, text services, and iCal, those familiar with the software claim.
Mac OS X 10.5.7 will represent the seventh incremental update to Leopard since the software hit the market in late October of 2007. It's expected to be released sometime in the coming months.