Tile 224, fish, is also used for meat. Don't know if there's a way around this, but for some reason the bulging, blockier version of the fish worked better as meat for me than the sleek new one.
Tiles 1 and 2, dead dwarves, are also used in engravings, where the fact that they're lying down kinda ruins it. This also applies to what you have done with certain other creatures commonly appearing in engravings. Even just a letter would be better for that. I can deal with a letter as a dead body/engraving, but a lying down engraving is kinda weird.
Your stone tiles have had some background put in them, presumably so that they do not appear jet black when designated. On the other hand, the coloured gashes of background do not blend well with the progressive darkening of the rest of the tile. I would suggest using alpha for this, and switching to png (I would also suggest switching everything with a 7 as a background to an 8 or a 0 in the raws).
Just a few things, I'll post more as I think of them.
edit: I just thought of something else. Wall tiles are also used for bridges, and the tiles you use here absolutely ruin the graphics for bridges. As in: No way, no how, either bridges go or this tile-set does. Another thing is that the tiles you have used for chairs are also used for vertical bridges. Therefore, the chairs have to blend nicely with whatever wall tile you picked. The best way to deal with this in my opinion is to make them look like little stone benches: See the version I posted earlier for example.