Having this mod enabled with Subterranio causes the game to fail to launch, citing the issue as what seems to be something with a base game image file?
Failed to load mods: The given sprite rectangle (left_top=0x0, right_bottom=120x120) is outside the actual sprite size (left_top=0x0, right_bottom=120x64).
If this is being used as an icon you may need to define the icon_size property.
See the log file for more information.: base/graphics/icons/arrows/down-arrow.png
This occurs if these two mods and their dependencies are the only mods enabled, but I'm not quite sure what this implies is going on.