if you have 2 or more services with the same initial chars
(such as nfs and nfsfs) then chkconfig on and off for one
changes both (with one exception - see that last example
below).  It looks like it gets the length of the first
service name (which apparently is the short one under most
cases) and then just pulls out all services that match for
that number of chars. It's probably the same issue with
bug#1166 - probably the same parse routine?  I wasn't sure
whether I should put in a new bug or try to add comments to
the 1166.

root@nox:/ [31] # rpm -q chkconfig-0.9.6-1
chkconfig-0.9.6-1
root@nox:/ [32] # chkconfig --list | grep nfs
nfsfs 0:off 1:off 2:off 3:on 4:on 5:on 6:off
nfs 0:off 1:off 2:off 3:on 4:on 5:on 6:off
root@nox:/ [33] # chkconfig nfs off
root@nox:/ [34] # chkconfig --list | grep nfs
nfsfs 0:off 1:off 2:off 3:off 4:off 5:off 6:off
nfs 0:off 1:off 2:off 3:off 4:off 5:off 6:off
root@nox:/ [35] # chkconfig nfsfs on
root@nox:/ [36] # chkconfig --list | grep nfs
nfsfs 0:off 1:off 2:off 3:on 4:on 5:on 6:off
nfs 0:off 1:off 2:off 3:on 4:on 5:on 6:off
root@nox:/ [37] # chkconfig nfsfs off
root@nox:/ [38] # chkconfig --list | grep nfs
nfsfs 0:off 1:off 2:off 3:off 4:off 5:off 6:off
nfs 0:off 1:off 2:off 3:off 4:off 5:off 6:off
--- here's the only time it works properly:
root@nox:/ [39] # chkconfig nfs on
root@nox:/ [40] # chkconfig --list | grep nfs
nfsfs 0:off 1:off 2:off 3:off 4:off 5:off 6:off
nfs 0:off 1:off 2:off 3:on 4:on 5:on 6:off
root@nox:/ [41] #