Here is a better detail:

http://picasaweb.google.cz/lh/photo/...eat=directlink

What happened? I dont know! I was testing this bike only, considering buying it (2007 Giant Anthem 2), I adjusted the brake positions to my wheels which I tried and after a ride I just noticed this damage. I have no clue if I made it (maybe tighted the brake screw too much?) or if it was already present when I got the bike... The brakes were Avid Juicy 3, I can imagine every screw has to have a certain Nm for mounting, maybe I gave it too many Nms... no clue.