Entire post mirrored here:
http://imgur.com/ZJt0VmT
Save it as well.
HTML source of the print friendly version: https://gist.github.com/anonymous/5193769
Or less artifacty screenshot: http://i4.minus.com/itHdo0GR7zXw1.png (Sorry to steal any thunder!)
Not affiliated, but minus.com doesn't compress high-res PNGs into JPEGs like imgur does (it's only at a certain size that imgur does it, but it's annoying for screenshot threads, or in this case).
Why did you save the image with transparency?