$ gnome-calculator -- --desktop_file_hint=unity8
(gnome-calculator:5516): Gdk-WARNING **: unknown property gtk-fallback-icon-theme
(gnome-calculator:5516): Gdk-WARNING **: unknown property gtk-icon-sizes
(gnome-calculator:5516): Gdk-WARNING **: unknown property gtk-alternative-button-order
(gnome-calculator:5516): Gdk-WARNING **: unknown property gtk-show-input-method-menu
(gnome-calculator:5516): Gdk-WARNING **: unknown property gtk-show-unicode-menu
(gnome-calculator:5516): Gdk-WARNING **: unknown property gtk-timeout-initial
(gnome-calculator:5516): Gdk-WARNING **: unknown property gtk-timeout-repeat
(gnome-calculator:5516): Gdk-WARNING **: unknown property gtk-timeout-expand
(gnome-calculator:5516): Gdk-WARNING **: unknown property gtk-color-scheme
......
$ gnome-calculator -- --desktop_ file_hint= unity8
(gnome- calculator: 5516): Gdk-WARNING **: unknown property gtk-fallback- icon-theme
(gnome- calculator: 5516): Gdk-WARNING **: unknown property gtk-icon-sizes
(gnome- calculator: 5516): Gdk-WARNING **: unknown property gtk-alternative -button- order
(gnome- calculator: 5516): Gdk-WARNING **: unknown property gtk-show- input-method- menu
(gnome- calculator: 5516): Gdk-WARNING **: unknown property gtk-show- unicode- menu
(gnome- calculator: 5516): Gdk-WARNING **: unknown property gtk-timeout-initial
(gnome- calculator: 5516): Gdk-WARNING **: unknown property gtk-timeout-repeat
(gnome- calculator: 5516): Gdk-WARNING **: unknown property gtk-timeout-expand
(gnome- calculator: 5516): Gdk-WARNING **: unknown property gtk-color-scheme
......