Look, here’s a screenshot with the grid as the background. (The hot pink areas are ad positions). Each white block is 60 pixels, each yellow line in between is 20px. (The background repeating is a bit messed up, but it’s supposed to repeat steadily all the way down).
As you can see every element sits inside one or more grid blocks, that’s what I meant… I hope it’s more clear now. If you got the Web Developer plugin for Firefox, you can edit grid.css and uncomment the last two lines. The grid and purple ad areas will then show up.
