If you run a (recent) Linux, and you type `pngcheck` (with no arguments) what version number do you get? Feel free to respond with your Linux distro, if you want.
4.0.1
4.0.0
3.0.3
earlier than 3.0.3
Poll ends at .
@svgeesus Debian 13 Trixie says 3.0.3-3