Comment 31 for bug 205496

I know that this does not fix the bug, but FWIW it may help somebody. For now, this works for me:

make a file /etc/udev/rules.d/50-scanner-kludge.rules, containing:
SYSFS{idVendor}=="04b8", SYSFS{idProduct}=="0130", MODE="664", GROUP="scanner"
(substitute your vendor and product numbers shown by sane-find-scanner)
Add yourself to the scanners group.

Unlike other suggestions on the web, I placed this in a new file so that it can be easily deleted when/if the root of the problem is fixed.