mate-desktop/mate-window-manager — pull request #17 by ketheriel (2012-10-16 16:48:00+00:00)
Title: improve support for button layout (ported from Ubuntu)

corrected support for button backgrounds with transparency; added 'no background' if theres
only one button and backgrounds no longer overlap if transparency is used.

Origin: Ubuntu
Bug: https://bugzilla.gnome.org/show_bug.cgi?id=608511
Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/metacity/+bug/535088