How to Modify Base Attack Bonus

[pabelfly]

Just noticed there's a typo here, it's in Fiendish Codex II.

Thanks for the typo correction.

I've never heard this interpretation before. How do you decide what type of BAB those extra HD give (1/1, 3/4 or 1/2)? If those HD were meant to give you BAB wouldn't it specify what type like it does for how many HPs they give you?

The argument isn't mine (and I don't agree with it), which is why I'd put it in the "ask your DM" basket. Just because I don't agree with it, though, doesn't mean everyone else thinks that.

Now, if I were to make the argument in favour of it, it would be, because you have extra hit dice, you get extra BAB, and it would be according to type, like Humanoid or Fey dice. However, I think that the bonus the ability gives to attack rolls covers it (although the ability doesn't explicitly rule out extra BAB from extra hit dice).