xsane 0.99+0.991-1ubuntu2 is working fine here on i386
$ scanimage -L device `plustek:libusb:005:009' is a Canon N670U/N676U/LiDE20 USB flatbed scanner
Let me know if you need more information to work out the differences between the environments.
xsane 0.99+0.991-1ubuntu2 is working fine here on i386
$ scanimage -L libusb: 005:009' is a Canon N670U/N676U/LiDE20 USB flatbed scanner
device `plustek:
Let me know if you need more information to work out the differences between the environments.