Comment 36 for bug 22438

(In reply to comment #35)
> here are the files in my /etc/hotplug/usb, as requested:
>
> /etc/hotplug/usb:
> total 176
> -rwxr-xr-x 1 root root 493 2004-11-28 05:00 kino-jogshuttle
> -rw-r--r-- 1 root root 457 2004-11-28 05:00 kino.usermap
> -rwxr-xr-x 1 root root 220 2005-09-27 14:43 libgphoto2
> -rw-r--r-- 1 root root 96304 2005-09-27 17:33 libgphoto2.usermap
> -rw-r--r-- 1 root root 49605 2005-09-27 16:14 libsane.usermap
> -rwxr-xr-x 1 root root 881 2005-09-16 03:13 logitechmouse
> -rw-r--r-- 1 root root 3695 2005-09-16 03:13 logitechmouse.usermap

Thanks, that indeed showed the problem: libusbscanner is missing. It is shipped
in the package, and it is installed both on a fresh install and on a
hoary->breezy upgrade. Can you please do

  sudo dpkg -i --force-confmiss
/var/cache/apt/archives/libsane_1.0.15-9ubuntu6_amd64.deb

and check that /etc/hotplug/usb/libusbscanner exists after that? Then your
scanner should work.

I'm not sure why that file is missing. Did you do some up/downgrading experiments?