My ultimate goal is to save rendered presentation MathML to a .PNG file. Knowing just enough about programming to be dangerous :-) there may be a better way to do this...I am drawing the equation on a canvas element, then trying to save the canvas element as a .PNG. I started with code found here -- https://developer.mozilla.org/en/HTML/Canvas/Drawing_DOM_objects_into_a_canvas... I am getting "Security error" with no code. Running a local Apache server. Do we think the canvas is dirty, even though, according to the Mozilla doc above, its not supposed to be? Any other way to do this? Thanks in advance...