Apparently there's an error with the stone arrowheads. They are named just "Arrowhead" but when trying to craft arrows, they are not recognized as arrowheads.
The recipe in question appears to be a straight copy of the 3.80 vanilla recipe.
Current BAC:
.Stone arrowhead. [effort:2] [phys:hands] *COMMON* %-30% /45/ [patch:5]
{Rock} [remove] (1) [patchwise] [noquality] '+(for the head)'
{Stone} '+(for grinding)' [noquality] [ground]
//3.80 gave this vanilla recipe
From vanilla 3.82
.Stone arrowhead. [effort:2] [phys:hands] *COMMON* %-30% /45/ [patch:5]
{Rock} [remove] (1) [patchwise] [noquality] '+(for the head)'
{Stone} (1) '+(for grinding)' [noquality]
I don't see a difference.
As such if it is a vanilla bug that needs to go to the Bug forums. However before doing that can someone do a check on a vanilla non-BAC game to see if stone arrowheads work?