Ok, I'm having a slight problem with the palette for... a tileset file.

This image shows you the problem. The image on the left is the palette the main image uses, and the image on the right is the one JJ2 thinks the tileset uses (at least, the one screenshots of it use...). This would be fine, except that it prevents some of the hardcoded palette events (Namingly 500 Bumper, Diamondus Pole and Small Tree) from looking right.
"Remap Tileset Palette" is off.

Does anyone know how to fix this to get the events working right?

Just fixed this in #jcstalk with Unknown Rabbit, thought I'd let people know so they dont boggle their minds about it

Anyways, here's a new lesson for the day when making tilesets:

When you're making the tileset for things that are hard coded into the palette (snow, pinball tools etc.), make 100% SURE that the colours you used are placed inside our tileset image! It would be even better if you made a mini drawing of your palette inside your tileset.

Fact of the day:
If there is any palette entry not used in your tileset (even if you put a different colour than black there), JCS will replace that entry with it's own colours.

And BELIEVE ME there's a lot of them, I was shocked when I saw it all.

Problem fixed, have fun making tilesets