Apple has just seeded OS X 10.7.3 to developers. The update focuses on iCloud document storage and issues relating to several of Apple’s native apps.
Developers are asked to focus on bugs involving iCal, Mail, and Address Book. Apple also warns that installing this 10.7.3 build will prevent one from reverting back to older versions of OS X Lion.
This particular update weighs in at 633MB and the build number is 11D16. A Lion Server update is also offered alongside the regular build, and both files can be downloaded from the Dev Center.