Late last week, Apple seeded the first build of what will ship as the free Mac OS X 10.6.5 update later this fall.
According to AppleInsider, the new build, numbered 10H525, incorporates fixes to existing problems with Exchange Server support, fixes user interface issues with embedded WebKit views in applications such as iTunes, and includes the graphics drivers in the earlier Snow Leopard Graphics Update release.
Apple is asking developers in particular to test iCal, Mail, printing, OpenGL 3D Graphics, QuickTime and the X Window X11 subsystems.
The current release of Mac OS X was last updated in June following WWDC. The initial developer build of Mac OS X 10.6.5 was anticipated to ship nearly a month ago in late July, but has continued to slip as Apple continues to focus its efforts on NVIDIA graphics drivers and related issues.
Stay tuned for additional details as they become available.