MacRumors has received word that Apple seeded OS X Leopard 10.5.8 Build 9L30 to developers last night, including only a single documented change related to an issue with external monitors and waking from sleep mode. There are reportedly no listed outstanding issues in the latest build.
Apple's previous seed of 10.5.8 (Build 9L29) was pushed to developers just five days earlier, and the single increment in build number between the two releases suggests that Apple may be very close to completing work on what many expect to be the final update to Leopard before the release of OS X Snow Leopard in September.
OS X 10.6 Snow Leopard will be available to Leopard users for only $29 and will primarily incorporate "under the hood" changes designed to improve performance and stability.