Comment 9 for bug 1620806

dino99 (9d9) wrote :

Well, quite old and probably explain such trouble:
https://launchpad.net/ubuntu/+source/light-themes
Adwaita is the ubuntu default since a while.

Recent naming is 'ubuntu-themes' which provide 'light-themes' and others
https://launchpad.net/ubuntu/+source/ubuntu-themes/16.10+16.10.20160829.3-0ubuntu1

So better report against 'ubuntu-themes' nowadays