Unrecognised segment type mirror

I have just recently installed LVM2 on top of a 4-disk software RAID5 array under Gentoo Linux (x86). I have four other machines with a similar configuration although they are variously EIDE, SATA, and SCSI-based).

This 5th machine gives the following error/warning whenever running any of the lvm tools (vgdisplay, pvdisplay, lvdisplay, vgscan, etc). The drives are all identical EIDE WD2500JBRTL, partitions are type fd, and are a single partition drives.

Unrecognised segment type mirror

This above error repeats once for each logical volume I create using, eg, lvcreate -L10G -nwhatever vg0

Here is the output from vgscan:

pus ~ # vgscan
Logging initialised at Sun Apr 8 19:39:58 2007 Set umask to 0077
Wiping cache of LVM-capable devices
Wiping internal VG cache
Reading all physical volumes. This may take a while...
Finding all volume groups
Finding volume group "vg0"
Unrecognised segment type mirror
Unrecognised segment type mirror
Unrecognised segment type mirror
Unrecognised segment type mirror
Unrecognised segment type mirror
Unrecognised segment type mirror
Found volume group "vg0" using metadata type lvm2
Wiping internal VG cache

I have tried various filters, etc, to no avail. It seems to be linked to the /dev/md/0 logical volumes. Here is the output from lvdisplay

pus ~ # lvdisplay
Logging initialised at Sun Apr 8 19:49:17 2007 Set umask to 0077
Finding all logical volumes
Unrecognised segment type mirror Unrecognised segment type mirror Unrecognised segment type mirror Unrecognised segment type mirror Unrecognised segment type mirror Unrecognised segment type mirror
--- Logical volume ---

  LV Name                /dev/vg0/ccache
  VG Name                vg0
  LV UUID                nO0w8H-WsOA-8djw-Xk9w-xE25-mH0o-9pD4B2
  LV Write Access        read/write
  LV Status              available
  # open                 2
  LV Size                2.00 GB
  Current LE             512
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:0

--- Logical volume ---

  LV Name                /dev/vg0/netstor
  VG Name                vg0
  LV UUID                38f0Cs-WJ0Q-BNhJ-yCwn-3oqw-xBHT-9yjKGy
  LV Write Access        read/write
  LV Status              available
  # open                 2
  LV Size                200.00 GB
  Current LE             51200
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:1

--- Logical volume ---

  LV Name                /dev/vg0/portage
  VG Name                vg0
  LV UUID                3AgwV0-lfLN-ksVr-68fT-d2E6-HsTE-ffEYOb
  LV Write Access        read/write
  LV Status              available
  # open                 2
  LV Size                10.00 GB
  Current LE             2560
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:2

--- Logical volume ---

  LV Name                /dev/vg0/livecd
  VG Name                vg0
  LV UUID                yfrzKx-pCnE-43Oc-QA0K-nooy-GTn8-EH16QM
  LV Write Access        read/write
  LV Status              available
  # open                 2
  LV Size                6.00 GB
  Current LE             1536
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:3

--- Logical volume ---

  LV Name                /dev/vg0/mediacell
  VG Name                vg0
  LV UUID                3xaj3s-1E8c-HJuH-8ADe-ZTuP-b8iW-PMcNuS
  LV Write Access        read/write
  LV Status              available
  # open                 2
  LV Size                20.00 GB
  Current LE             5120
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:4

--- Logical volume ---

  LV Name                /dev/vg0/home
  VG Name                vg0
  LV UUID                3vD1l9-oCwM-pG8C-c37H-p9hw-HIWq-D1hB0k
  LV Write Access        read/write
  LV Status              available
  # open                 2
  LV Size                60.00 GB
  Current LE             15360
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:5

Wiping internal VG cache

I'd appreciate any help, this error only happens on this machine.

thanks,
Don B