Thanks to Patrick Wigmore and Curtis Gedak for diagnosing the problem and coming up with a way to revert the problem.
I downloaded the .deb files linked to from Bug #1780664. Then sudo dpkg -i \ libgbm1_17.2.8-0ubuntu0~16.04.1_amd64.deb \ libwayland-egl1-mesa_17.2.8-0ubuntu0~16.04.1_amd64.deb \ libegl1-mesa_17.2.8-0ubuntu0~16.04.1_amd64.deb \ libgl1-mesa-dri_17.2.8-0ubuntu0~16.04.1_amd64.deb \ libgl1-mesa-dri_17.2.8-0ubuntu0~16.04.1_i386.deb \ mesa-vdpau-drivers_17.2.8-0ubuntu0~16.04.1_amd64.deb Then restarted the machine, tho restarting X might have done the job. Now I am back to menus and buttons looking like they should. Really good, thanks. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1780846 Title: After update 2018-07-08 menus and buttons are behaving badly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1780846/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
