Icons not being installed correctly
Building 3.28.1 the 512x512 icon is installed into all the various icon size subfolders.
-rw-r--r-- root/root 60920 2018-04-14 13:26 ./usr/share/icons/hicolor/16x16/apps/org.gnome.Nautilus.png
-rw-r--r-- root/root 60920 2018-04-14 13:26 ./usr/share/icons/hicolor/22x22/apps/org.gnome.Nautilus.png
-rw-r--r-- root/root 60920 2018-04-14 13:26 ./usr/share/icons/hicolor/24x24/apps/org.gnome.Nautilus.png
-rw-r--r-- root/root 60920 2018-04-14 13:26 ./usr/share/icons/hicolor/32x32/apps/org.gnome.Nautilus.png
-rw-r--r-- root/root 60920 2018-04-14 13:26 ./usr/share/icons/hicolor/48x48/apps/org.gnome.Nautilus.png
-rw-r--r-- root/root 60920 2018-04-14 13:26 ./usr/share/icons/hicolor/512x512/apps/org.gnome.Nautilus.png
Presumably this is fallout from commit 79914350