My favorite technique for optimizing PNG files comes from Wikipedia's page on preparing images to be used in Wikipedia: http://en.wikipedia.org/wiki/Wikipedia:

My favorite technique for optimizing PNG files comes from Wikipedia's page on preparing images to be used in Wikipedia: http://en.wikipedia.org/wiki/Wikipedia:Preparing_images_for_upload#PNG_tips http://en.wikipedia.org/wiki/Wikipedia:Preparing_images_for_...