The next update of Snow Leopard will offer improvements to both graphics cards and Time Machine.

Almost to the day one month after the last update of the Snow Leopard, Apple has now seeded the first beta version of Mac OS X 10.6.4 to registered developers.

According to the website iPhoneInCanada the build is 10F37 and the focus of this update is on graphics drivers, SMB, Time Machine backups, USB, and VoiceOver.

There is also one known issue identified as:

* Password will be requested when launching iChat

Final version is expected to be available sometime this summer.