[Bananadine]

Okay, wait, now I am confused. Apparently my pure Abysians with darkvision 50 were indeed taking a penalty--it's just that they don't display it the same way as the humanbred with darkvision 0. When I click a humanbred's Attack Skill value, I see:

Basic Attack Skill: 10
Darkness: -5
Current Attack Skill: 5

But when I click an Abysian Infantry's Attack Skill value, I see:

Basic Attack Skill: 10
Current Attack Skill: 7

So there's a penalty of 3 points that's applied but not listed, and that's what had been throwing me off. I guess this is still a bug in the listing, but that's not nearly as important as a bug in the calculation would be.