Today I was in Fort Ghelsba.. ran into a tent.. killed a cursemaker.. dropped a key first kill. :D I was than curious as I saw a treasure chest up top near the zone to Yutto.. I traded it the key *grin* I received cougar katnatsmacknipples *i cant remember how to spell them* but they are level 20, h2h weps with additional ice attack. I than hunted for another key for the airship pass, and got it within about 30 minutes inside Yutto.. I was with a friend and on the way back we killed a few more orcs, and got another key.. and the treasure chest was up again, she gave the key to it, and we both got 630 gil.
So theres 2 things from the chest.. the cougar claw dealies, and gil :)~