portmap: server localhost not responding, timed out

[Pafnoutios]

After booting, I find the following in my dmesg:

portmap: server localhost not responding, timed out
RPC: failed to contact portmap (errno -5).
portmap: server localhost not responding, timed out
RPC: failed to contact portmap (errno -5).
lockd_up: makesock failed, error=-5
portmap: server localhost not responding, timed out
RPC: failed to contact portmap (errno -5).
lockd_up: no pid, 2 users??

ifconfig says lo is up:

# ifconfig lo
lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:609 errors:0 dropped:0 overruns:0 frame:0
          TX packets:609 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:44308 (43.2 Kb)  TX bytes:44308 (43.2 Kb)

localhost is configured in my /etc/hosts file:

# cat /etc/hosts

127.0.0.1       localhost
...

And my routing table looks right to me:

# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.1.0     *               255.255.255.0   U     0      0        0 eth0
127.0.0.0       localhost       255.0.0.0       UG    0      0        0 lo
default         192.168.1.1     0.0.0.0         UG    0      0        0 eth0

My only symptoms seems to be that mounting my NFS mounts at bootup takes a couple of minutes, but they still mount, and they sometimes fail to unmount at shutdown.