I started to experience this yesterday woth gnome-shell (3.3.90-0ubuntu1) and with Adwaita theme. I have seen this both with NVidia proporeatary drivers and with ATI open source drivers.
The work around is to downgrade GTK+3 from the latest version (3.3.20-0ubuntu1) back to 3.3.18. This is a GTK+3 issue. ** Package changed: gnome-shell (Ubuntu) => gtk+3.0 (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/961310 Title: black titlebars in GNOME after login To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gtk+3.0/+bug/961310/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
