>
> root@ldesk:/etc# ls -lF dh*
> total 28
> -rw-r--r-- 1 root root 1554 2006-09-06 09:00 dhclient.conf
> -rw-r--r-- 1 root root 1566 2005-09-14 17:41 dhclient.conf~
> drwxr-xr-x 2 root root 4096 2006-07-13 15:03 dhclient-enter-hooks.d/
> drwxr-xr-x 2 root root 4096 2006-06-07 21:33 dhclient-exit-hooks.d/
> -rwxr-xr-x 1 root root 8322 2006-05-05 08:02 dhclient-script*
> root@ldesk:/etc# cd dhclient-enter-hooks.d/
> -su: cd: dhclient-enter-hooks.d/: No such file or directory
> root@ldesk:/etc# ls -al dhclient-enter-hooks.d
> ls: dhclient-enter-hooks.d: No such file or directory
> root@ldesk:/etc#
>

Are the reported directories dhclient-*-hooks.d actually present?  As you
can see, even root cannot cd into them or list contents.
-- 
Be who you are and say what you feel, because those who mind don't matter
and those who matter don't mind.  - Dr. Seuss