biox/Gnome-Shell-Window-Buttons-Extension — pull request #1 by hotice (2011-11-19 15:14:20+00:00)
Title: use Ambiance window buttons for the default theme

I'm not sure if this is the intended behavior, but currently using the default theme, the window buttons are transparent. So I've modified them to use the Ambiance window buttons by default. This may only be useful for Ubuntu users so you can reject it ...