same thing here under Ubuntu 14.10 gtk3 widget factory, gnome-tweak-tool and gnome-control-center backgrounds (some of the listed items) are transparent under gnome-fallback, and turn to black under gnome-shell. Even the second tab "resources" in gnome-system-monitor is transparent. I turned the theme from Ambiance to Adwaita but the problem persists.
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to gtk+3.0 in Ubuntu. https://bugs.launchpad.net/bugs/1285783 Title: Right panel has a transparent background Status in “gtk+3.0” package in Ubuntu: Confirmed Status in “ubuntu-themes” package in Ubuntu: Fix Committed Bug description: Launching gnome-tweak-tool and choosing a category on the left panel makes the right panel transparent. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gtk+3.0/+bug/1285783/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp