I remember seeing this error when I had upgraded from dapper to edgy. it was caused by some leftover files (indeed /etc/udev/rules.d/10-wacom.rules and another file from another package).
deleting the old files did no harm and fixed the problem. -- udev error message at boot : invalid rule https://launchpad.net/bugs/71491 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
