They don't have that option? I thought that was the "Euclidean" distance... Or maybe I'm remembering that wrong. I've never really worried that much about anything beyond number of squares, I'm afraid. Either way, just in case you have't seen it, if you look under settings for your individual pages there's a drop down, "Diagonals", to change how diagonals are measured. I thought for sure that was one of them.