updated 04:50 pm EDT, Mon June 13, 2011
Finished patch likely to be last for Snow Leopard
Apple is seeding a fourth build of Mac OS X 10.6.8 to developers, 10K537. The file is 454MB in delta form, or 1GB as a combo update. Apple is reporting no known issues, but asking developers to test graphics drivers, QuickTime and the Mac App Store, as well as networking components including AirPort and VPN functions.
The completed v10.6.8 patch should be Apple's last major update of Snow Leopard. OS X Lion is shipping in July, and Apple will likely want to concentrate most of its efforts on the newer software. The final version of Leopard, significantly, was v10.5.8.