Slate

Slate is the default visual style used in Longhorn builds ranging from 4042 (Lab06_n) to 4093. It replaced the Plex theme in the role of placeholder for the heavily secured Aero theme, a fork of which, namely Jade, coexisted with Slate in later milestone 7 builds. It is possible to find earlier bits of the Slate theme in the  (  in later builds) folder of its visual style resources, specifically regarding the taskbar, sidebar and sidebar clock, probably fitting builds in the milestone 5 range, thus demonstrating that this theme has been in development much earlier than it is commonly thought and has been kept away from regular Lab06 builds.

Bugs and quirks

 * Starting from build 4066, the start button which appears when the sidebar is enabled suffers from a bug which makes it stretch in a low quality way. Its hitbox does not reach all the way to the corner as well.