Ok, I know what has happened. In Disco the default shell theme has dark topbar menus (and light popup windows eg ALT F2) so the topbar menus are always dark. But now in Eoan the topbar menus have changed to always be "light". See the attached screenshot, where I have selected "Try Ubuntu" from the default installer ISOs for each release.
It must be an Ubuntu thing, because gnome-shell 34 still has the dark menus (eg see screenshots at https://www.omgubuntu.co.uk/2019/06/a -quick-look-at-gnome-shell-3-34-theme-improvements). I guess the devs are trying to make yaru appear everywhere, except maybe they forgot all about yaru-dark. It looks much worse IMHO, because the menus don't match the dark toolbar (and definitely don't match the applications if you choose yaru-dark). Unfortunately, Ubuntu doesn't include a dark shell theme, so you have to jump through an annoying number of hoops to get it set up to look the way you want. But then, isn't that the gnome-shell philosophy?! :) ** Attachment added: "Eoan vs Disco.png" https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1842886/+attachment/5287050/+files/Eoan%20vs%20Disco.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1842886 Title: gnome-shell top bar menus no longer honour application theme settings, eg dark themes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1842886/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs