Release Notes: An error regarding extra format arg on no alignment was fixed. Backwards different height/width errors were fixed. You can now join images with different widths/heights, as long as the side you are joining is the same size.
Release Notes: A pngcrush option was added. The -v option was fixed. The -o 0 exception which occurred when optimization was already turned off was fixed. The NAME section of the manpage was fixed.
Release Notes: Initial release.