It uses Be-like shaped titlebars, KDE standard buttons, has a shaped resize
handle, and automatically detects if you are on a highcolor display and if so
uses gradients based off the current color scheme. BTW, the buttons don't
necessarily match the titlebar but use the button foreground setting in KDE's
display settings so you can change them to whatever you like.
If no one objects I'll probably disable the old Be style. Unlike this style it
uses Be-like buttons but the drawing isn't very fancy and Be's two buttons are
a big restriction in KDE.
You can see a screenshot at:
http://www.mosfet.org/b2kwin.gif
svn path=/trunk/kdebase/kwin/; revision=44420