[CR 2] Arrowhead (Explosive) + Empty Cup | Cup of Oil + Fire Arrowhead
does not work as of july 17, most recent version.
the other explosive arrowhead (fire resistance potion + arrowhead) still works fine.
an item not mentioned in the list:
-intestines: basically appears to work in crafting like rotten food or fly agaric (poison effect to whatever it is added to).
Joshua's spice appears to be broken. does not give any crafting messages.