Ashtagon wrote:PF does allow for racial bonuses with specific sub-sections of the Perception skill. For example, vanilla elves have:
Keen Senses: Elves receive a +2 bonus on sight and sound-based Perception checks.
Those are actually from earlier Beta versions of PF. Currently, they just grant a flat +2 bonus to Perception (for elves, halflings, gnomes, and half-elves).
I can't recall specifically when/where they dropped that part of the Perception check (I stopped following progress on the Beta at one point, and am only just now getting caught up with the Pathfinder Alpha, having recently picked it up), but I suspect it was dropped because if was too much paperwork hassle to deal with. Considering that Listen and Spot are both kind of admixed together as Perception now, I'd say it would be pretty rare to have an instance where you wouldn't have a Perception check that dealt with both senses (sight and sound), or at least none worth bothering with.
That said, there are still precedents- dwarves, for example, receive a +2 Perception bonus when dealing with specific instances of stonework (their Stonecunning ability), so we could do something like that.