Ubuntu MATE:
mate-themes is updated for GTK 3.20; it just needs to be synced from Debian when ready.
But Ubuntu MATE actually uses ubuntu-mate-themes by default, derived from ubuntu-themes, bug 1593054
Xubuntu:
greybird needs to be updated, see bug 1586691
numix-gtk-theme is updated but the update needs to be packaged
Ubuntu GNOME:
gnome-themes-standard, done in the GNOME 3 Staging PPA
Theming! Tracking bugs...
Ubuntu:
bug 1593048
Ubuntu MATE:
mate-themes is updated for GTK 3.20; it just needs to be synced from Debian when ready.
But Ubuntu MATE actually uses ubuntu-mate-themes by default, derived from ubuntu-themes, bug 1593054
Xubuntu:
greybird needs to be updated, see bug 1586691
numix-gtk-theme is updated but the update needs to be packaged
Ubuntu GNOME: standard, done in the GNOME 3 Staging PPA
gnome-themes-