Apple equipped its vast developer community with a new build of the maintenance and security release, according to people familiar with the matter. The target build is said to be Mac OS X 10.5.7 build 9J27, which’s internally referenced in some circles as "Juno" or project Juno. The build arrived with nearly six dozen code corrections, a barebones weight of 440 megabytes, and requests that developers focus their testing efforts on over 20 core components, including AirPort, Mail, graphics drivers, and Time Machine. Among the changes were about 10 new bug fixes targeting FileVault, Time Capsule, preference panes for Print & Fax and MobileMe, iCal sync, and more.
Source:→ Apple Insider