sudoers is mode 0441, should be 0440 ????

[Marcel Broekman]

Hi all,

All of a sudden sudo stopped working. Whwn i issue a sudo command sudo 
replies with: sudoers is mode 0441, should be 0440

from sudo.log:
May 17 23:05:30 : customer : /usr/local/packages/sudo-1.6.3/etc/sudoers 
is mode 0441, should be 0440 ; TTY=pts/0 ; PWD=/export/home/customer ; 
USER=root ; COMMAND=/bin/sh

What does this mean and how to repair this?

TIA, Marcel