As predicted last week, Apple has seeded the first developer version of Mac OS X 10.6.4, termed Build 10F37, to developers today. iPhoneinCanada as usual is on top of the details, noting improvements to a handful of areas.
According to reports, the current build focuses on Graphics Drivers, SMB, Time Machine backups, USB, and VoiceOver. The build does not include any further updates or enhancements.
Documentation accompanying the seed reportedly notes one outstanding known issue involving iChat requesting password entry upon launch.
Mac OS X 10.6.3 was released to the public on March 29th, but Apple's variable development and seeding cycles offer little indication of when 10.6.4 might be ready for a final release.
