Ubuntu Gusty (7.10) and Wacom

I upgraded my Toshiba Protege M400 to Gusty and to my surprise the wacom input stopped working. After searching the internet without much success, I notice that there were two wacom devices, /dev/wacom and /dev/input/wacom. Both were symlinks to /dev/ttyS0, which makes sense as the tablet is basically a serial device attached to the notebook. In my /etc/X11/xorg.conf I had the lines

  Option        "Device"        "/dev/wacom"

under the wacom cursor, stylus, and eraser input devices. After changing the lines to

  Option        "Device"        "/dev/input/wacom"

and restarting X, the input started working again. Why? I don’t know, as they both point to /dev/ttyS0.

Hopefully this is helpful to someone out there.