start gtk3-demo from a terminal you get those warning:
(gtk3-demo:41600): Gtk-WARNING : 14:43:27.183: Theme directory 16x16/panel of theme Mkos-Big-Sur has no size field
(gtk3-demo:41600): Gtk-WARNING : 14:43:27.185: Theme directory 16x16@2x/places of theme Mkos-Big-Sur has no size field
(gtk3-demo:41600): Gtk-WARNING **: 14:43:27.187: Theme directory 24x24/apps of theme Mkos-Big-Sur has no size field
hey,
start gtk3-demo from a terminal you get those warning: (gtk3-demo:41600): Gtk-WARNING : 14:43:27.183: Theme directory 16x16/panel of theme Mkos-Big-Sur has no size field (gtk3-demo:41600): Gtk-WARNING : 14:43:27.185: Theme directory 16x16@2x/places of theme Mkos-Big-Sur has no size field (gtk3-demo:41600): Gtk-WARNING **: 14:43:27.187: Theme directory 24x24/apps of theme Mkos-Big-Sur has no size field