As is, Wary is defined with:
PREMULT:1,[PREABILITY:1,CATEGORY=Special Ability,Drow Blooded ~ Half-Elf],[!PREABILITY:1,CATEGORY=Special Ability,TYPE.HalfElfRacialVision,HalfElfAdaptability]
which makes it replace Low-Light Vision and Adaptability instead of just Keen Senses. It also checks for the wrong trait (Drow Blooded).
I fixed it thusly:
TYPE:RacialTraits.SpecialQuality.HalfElfRacialTrait.HalfElfSenses PREMULT:1,[PREABILITY:1,CATEGORY=Special Ability,Wary ~ Half-Elf],[!PREABILITY:1,CATEGORY=Special Ability,TYPE.HalfElfSenses]
Angelus - Would you like to join the data team? You seem to already have the skill.
Completed: At revision: 21729
Do consider my offer to join up. I can always use more volunteers.
Well, I mostly fix stuff that I end up using for my own campaigns rather than comb through most data to find errors, but if that's helpful enough to you guys, then it may be an idea.