I'm seeing lots of theme parsing errors about deprecated properties when using the theme on Xubuntu 16.10 (yakkety), which uses the Xfce desktop and GTK 3.20.9:
Not using units is deprecated. Assuming 'px'.
The style property GtkButton:default-border is deprecated and shouldn't be used anymore. It will be removed in a future version
The style property GtkButton:default-outside-border is deprecated and shouldn't be used anymore. It will be removed in a future version
The style property GtkButton:image-spacing is deprecated and shouldn't be used anymore. It will be removed in a future version
The style property GtkButton:inner-border is deprecated and shouldn't be used anymore. It will be removed in a future version
The style property GtkRange:slider-width is deprecated and shouldn't be used anymore. It will be removed in a future version
The style property GtkRange:stepper-size is deprecated and shouldn't be used anymore. It will be removed in a future version
The style property GtkRange:stepper-spacing is deprecated and shouldn't be used anymore. It will be removed in a future version
The style property GtkRange:trough-under-steppers is deprecated and shouldn't be used anymore. It will be removed in a future version
The style property GtkScrollbar:min-slider-length is deprecated and shouldn't be used anymore. It will be removed in a future version
The style property GtkWidget:focus-line-width is deprecated and shouldn't be used anymore. It will be removed in a future version
The style property GtkWidget:focus-padding is deprecated and shouldn't be used anymore. It will be removed in a future version
The style property GtkWidget:interior-focus is deprecated and shouldn't be used anymore. It will be removed in a future version
I'm seeing lots of theme parsing errors about deprecated properties when using the theme on Xubuntu 16.10 (yakkety), which uses the Xfce desktop and GTK 3.20.9: