MS has just published a new dashboard revision for the 360.
Today, Dash 16767 is available on XBLive.
Changes are minor.
Only changes is the auto-downloads and a minor change under the Games section.
wikipedia said:Fixes video issues.
Improves overall performance.
Small changes in the Games section.
Added options for auto-downloads, background downloads and shutdown timer under console settings
Source: Meself, just turned me console on.