The latest version of udev has some upstream changes in the configuration layout.
Permissions and user/group ownership are no longer defined in separate files -- instead they are specified within the rules file itself. Look at /etc/udev/rules.d/udev.rules for examples.
This means that any custom permissions need to be moved into a rules file like /etc/udev/rules.d/udev.rules or /etc/udev/rules.d/00-my.rules.
See the udev(8) manpage for more information on writing rules.