The Canon PIXMA MX430 Series says untested on this page, http://www.sane-project.org/sane-mfgs.html However scanning works perfectly for me over the network through wifi/ethernet, and from USB, the ADF and flatbed works, scanning up to 1200dpi works. Specifically it's a MX432, I'm on Gentoo x86_64, CUPS 1.6.4, sane-backends 1.0.24-r1.