What? Another bug? I hope not. Is there another depot elsewhere? That always seems to cause problems. Who the heck made a brass depot anyway? Felsite is fine!
The brass trade depot is my doing. I built it out of the remnants of ChJees' tomb, so it's probably his ghost come to prevent us from getting any meat or fancy metals. Honestly though, I don't know what the problem is. That other trade depot (next to the original entrance) was too far from the now main entrance. Since it's the last legacy of Antlia (the first one) I left it there, and forbid'd the stones it's made from, which has always made traders ignore it. I guess it can be torn down if you want.
The only time I had any problem with traders was when a dwarf caravan got attacked by goblins, they scattered out of the depot, one got badly wounded, and for some reason, they never registered as being there, and just sort of shuffled off without a word after sitting on the depot for a few minutes. Sounds like we've got another wacky problem going on. Hopefully it won't need any more time travel to fix.
EDIT: Looked around the save, and... holy hell what happened to this place? Dadam's gone mad with power and has placed 200% markups on almost everything, Aqizzar has imprisoned one of his own guards for somehow failing the Count's mandate, there's collapsed cave in the bedrooms, dwarf bones in the cave river, a pile of rotting fat in the bottom of the tombs, a shack out in the woods, a bone carver with a room full of goblin armor, the Dungeon Master has a private army of wardogs, and an Elven diplomat is scratching his nose at the border.
But hey, we've got a philosopher! And a tax collector. And a new mayor, but Zulgar (who I was starting to like) still owns the mayor's office.