Wierd, Black Grid

[Jam0864]

Lately, everytime I go to edit a map it has a thick, black grid over it. If I try to run the map with the grid on it, the grid shows up multi-coloured on the screen. I've uploaded an image of the map-editor and the game at runtime here,

http://www.box.net/shared/ttoplv9jp1

Also, this happens on every map I create but only on this project. So it's nothing to do with my computer, I've just stuffed something up.

[bluemonkmn]

Looks like you made your tile size too big in your tileset.  The tile size of a tileset determines how far apart the tiles are drawn on a layer.

[Jam0864]

Yep that was it, thanks!