While upgrading from Lenny to Squeeze, at each boot, I had these messages : udevd[371]: SYSFS{}= will be removed in a future udev version, please use ATTR{}= to match the event device, or ATTRS{}= to match a parent device, in /etc/udev/rules.d/z60_xserver-xorg-input-wacom.rules:65 udevd[371]: SYSFS{}= will be removed in a future udev version, please use ATTR{}= to match the event device, or ATTRS