Not the best way to make a first post, but I have a bug to report. This is hardly large or game-breaking but it has to do with the game's math so I figured it worth mention, and couldn't find any notice of it elsewhere.
In my last few fortresses (two stock DF, one with the Martial Arts mod) I've seen pig-tail bags with no contents, no decoration, and equal quality with different prices. It might happen with bags of other cloth or any bags or any cloth items, but this is the only way I've noticed.
Standard quality, undecorated, empty bags sometimes have a value of 60, sometimes 80. Well-crafted ones are either 80 or 100. I've seen this with bags made in house and empty bags bought from traders. One recent caravan had several identical bags with different prices (really should have taken a screenshot).
Which is odd since according to the wiki, unless I'm mistaken or the wiki is, pig-tail bags should cost 10(furniture)x2(pig-tail)+20(cloth) = 40, and well-crafted ones would be 10x2x2+20 = 60. If bags are actually finished goods then it'd be 15x2[x2]+40 = 70/100. That said I'll bet it has something to do with the cloth price function.
Funny equations aside, I'm sure everything uses the same algorithm, so I can't image why it would return two different values for two copies of the same item.
Has anyone else seen this? Like I said, I've seen it in different fortresses so it should be present anywhere.