Side note: What do you guys think of the text color for the floss colors? I have it set so any color with <.5 brightness gets white and the others get black.
Icelandic Hitman: I should have read your note sooner and more closely because it was the antialiasing causing the light grid lines. Aliasing and a 2.0 line width fixed it. Also, I do still need to optimize the grid drawing. It works fine at 500x500, but is sluggish at 2,000x2,000, especially since all the lines need to be redrawn with every click!
Off to do Chemistry!


(Sorry about the crappy image quality, it might be from resizing the pic in photobucket to fit the forum here.)