According to both the Core Rules & Hero Lab Ghost touch can be added to any melee weapon.
Yet on pg 19 in The haunting of Harrowstone.
One of the rewards is 5 +1 Ghost touch arrows.
So the question is. Is Ghost touch now valid for ammo as well. If so I think someone should also let the fine folks at Lone Wolf know in order to change it their data sets for Hero Lab.
Thanks
Ghost Touch isn't listed in the random magic ranged weapon table, but the text of the Ghost Touch ability doesn't restrict it to melee weapons (as e.g. Brilliant Energy), and text overrules tables.
I dont have a problem with it either. But Im looking for a bit of an official comment so I or Paizo can pass it along to Lone Wolf