it's scanner not scanners for the group name
The xsane application runs from a user shell if I unplug and replug in the USB cable. However, I have to do this each time I reboot.
You have to be in the group scanners or plugdev.
I don't know where group "scanners" is; however, feel free to move this post to there if you wish to. This scanner has worked OK for many months on aptosid. Only after d-u have I had problems, so I thought it was an upgrade problem.