Hmm, I guess that may help, but I tried all kinds of things already. The problem doesn't show up when I paste the tileset into paint, then save it... but the colors are aweful when I do that. Remapping the tileset pallet in JCS doesn't work. Ah , and the problem is in full screen and windowed mode. I know I said it was only in windowed mode, but I found it is a problem either way.