Appears a bug has caused boar-tusk arrows to always fail the crafting process now. This was bugged last night and here are the steps:

>get book from my pack
You get a book of master crafting instructions from inside your red-leucro pack.
>study my book
You scan the boar-tusk arrows instructions with a glance and completely understand all facets of the design.
You now feel ready to begin the crafting process.
Roundtime: 8 sec.
>put my book in my pack
You put your book in your red-leucro pack.
>get shaper from my bag
You get a curved wood shaper with an osage grip from inside your sea bag.
>get shafts from my bag
You get some arrow shafts from inside your sea bag.
>shape shafts with my shaper
You place the excess parts at your feet.
You flip some unfinished boar-tusk arrows over and begin to shape it with your shaper.

The arrows are ready for an application of glue to affix the arrowheads.
Roundtime: 15 sec.

You need another boar-tusk arrowheads to continue crafting some unfinished boar-tusk arrows. You believe you can assemble the two ingredients together once you acquire them.

[Ingredients can be added by using ASSEMBLE Ingredient1 WITH Ingredient2]
>put my shaper in my bag
You put your shaper in your sea bag.
>get boar-tusk arrowheads from my bag
You get some boar-tusk arrowheads from inside your sea bag.
>assemble my arrows with my arrowheads
The boar-tusk arrowheads is not required to continue crafting some unfinished boar-tusk arrows, so you stop assembling them.

AT THIS POINT YOU CAN DO NOTHING BUT DUMP the arrows because the arrows now be come name boar-tusk arrows with no arrowheads.

Happens 100% of the time.