The following packages have been updated in the Cygwin distribution: * libpng16-1.6.18-1 * libpng16-devel-1.6.18-1 * libpng-devel-1.6.18-1 * libpng-tools-1.6.18-1 libpng is the official reference library for the Portable Network Graphics (PNG) image format. This is an update to the latest upstream release. -- Yaakov