I'm using RC3, and I'm having some trouble with the palette on 8-bit tiles.
Here is a image of some combos in ZQ:
The first image is normal. The second image represents what the palette looks like using level palettes 1, 5, 7, 9, B, E, or F. The third image represents level palette 12. I've roughly checked the level palettes up to about 20, and none after 12 have this sort of problem.
Here is the quest that is having this problem:
http://www.mediafire.com/?5d97dbdf4nq5452