I neglected to add my libusb-0.1.12 information to the previous long
configuration description, which apparently directly affects the udev
device node mapping, permissions, etc.
I also found this forum comment:
"What *should* happen is that the udev rules in
/etc/udev/rules.d/60-libsane.rules get
Please forgive the very long post, but I wanted to get some specifics
recommended actions to restore access to my Canon LIDE20 scanner, which
has been inaccessible roughly since the upgrade to sane-backends-1.0.17.
My scanner problems seemed to closely match reports those of users with
permissions