NFS gone after upgrade?

[H. Rosmanith]

hello,

I did an "opkg upgrade" from 2007 dist to 2008.8, and changed the
/etc/opkg/* files accordingly:

    root at om-gta02:~# cat /etc/opkg/all-feed.conf 
    src/gz daily-all http://downloads.openmoko.org/repository/Om2008.8/all
    root at om-gta02:~# cat /etc/opkg/*             
    src/gz daily-all http://downloads.openmoko.org/repository/Om2008.8/all
    arch all 1
    arch any 6
    arch noarch 11
    arch arm 16
    arch armv4t 21
    arch fic-gta02 26
    arch neo1973 31
    arch om-gta02 36
    src/gz daily-armv4t http://downloads.openmoko.org/repository/Om2008.8/armv4t
    cat: /etc/opkg/bak: Is a directory
    src/gz daily-neo1973 http://downloads.openmoko.org/repository/Om2008.8/neo1973
    src/gz daily-om-gta02 http://downloads.openmoko.org/repository/Om2008.8/om-gta02
    src/gz scaredycat-all http://downloads.openmoko.org/repository/Om2008.8/all
    src/gz scaredycat-armv4t http://downloads.openmoko.org/repository/Om2008.8/armv4t
    src/gz scaredycat-neo1973 http://downloads.openmoko.org/repository/Om2008.8/neo1973
    src/gz scaredycat-om-gta02 http://downloads.openmoko.org/repository/Om2008.8/om-gta02

after doing an upgrade, I'm unable to nfs-mount exported filesystems from my
host-machine.

    root at om-gta02:~# mount host:/opt/moko /opt
    mount: unknown filesystem type 'nfs'
    root at om-gta02:~# cat /proc/filesystems 
    nodev   sysfs
    nodev   rootfs
    nodev   bdev
    nodev   proc
    nodev   debugfs
    nodev   sockfs
    nodev   usbfs
    nodev   pipefs
    nodev   anon_inodefs
    nodev   futexfs
    nodev   tmpfs
    nodev   inotifyfs
    nodev   devpts
            ext3
            ext2
            cramfs
    nodev   ramfs
            msdos
            vfat
            iso9660
    nodev   jffs2
            romfs
            udf

any idea how to fix this?

thanks,
h.