The canvas element has no toDataURL() method, making it difficult to save the contents of a canvas. http://www.whatwg.org/specs/web-apps/current-work/multipage/section-the-canvas.html#todataurl
Created attachment 18182 [details] Testcase for toDataURL()
Created attachment 19600 [details] patch
Comment on attachment 19600 [details] patch Woo!
Landed in r30888.