under nfs mount options, kilobyte shorthand is not parsed

Binary package hint: nfs-common

I try:
root@devo:/# mount -o rw,nosuid,nodev,noatime,hard,intr,rsize=32k,wsize=32k,addr=10.0.0.18 xxx:/r1/home/user /home/user
mount.nfs: an incorrect mount option was specified

from syslog:
syslog:May 12 17:49:04 devo kernel: [ 3322.067038] NFS: unknown mount option: rsize=32k

Testing with no shorthand:
root@devo:/# mount -o rw,nosuid,nodev,noatime,hard,intr,rsize=32768,wsize=32768,addr=10.0.0.18 britney:/r1/home/msilvey /home/msilvey
root@devo:/#

It would be nice to have the shorthand for kilobytes be understood.

root@devo:/var/log# dpkg -l|grep nfs
ii libnfsidmap2 0.20-0build1 An nfs idmapping library
ii nfs-common 1:1.1.2-2ubuntu2 NFS support files common to client and serve

root@devo:/var/log# dpkg -l|grep linux
ii libselinux1 2.0.55-0ubuntu4 SELinux policy enforcement, run-time librari
ii linux-image-2.6.24-16-generic 2.6.24-16.30 Linux kernel image for version 2.6.24 on x86
ii linux-image-amd64-k8 2.6.24.16.18 Upgrade dummy package. Can be removed
ii linux-image-generic 2.6.24.16.18 Generic Linux kernel image
ii linux-ubuntu-modules-2.6.24-16-generic 2.6.24-16.23 Ubuntu supplied Linux modules for version 2.
ii util-linux 2.13.1-5ubuntu2 Miscellaneous system utilities
ii util-linux-locales 2.13.1-5ubuntu2 Locales files for util-linux

root@devo:/var/log# more /etc/issue
Ubuntu 8.04 \n \l