Adding rights to your user in Authorizations - and rebooting - solved the problem for my Epson Perfection 1650 - see https://bugs.launchpad.net/ubuntu/+source/xsane/+bug/205496
Adding rights to your user in Authorizations - and rebooting - solved the problem for my Epson Perfection 1650 - see https:/ /bugs.launchpad .net/ubuntu/ +source/ xsane/+ bug/205496