[linux-lvm] pvmove fails with "Failure parsing mirror status fraction: 1 core"

[Vesa-Pekka Palmu <palmu aski hut fi>]

I'm trying to move data away from a raid1 array in a volume group to a 
raid5 array and pvmove fails with error "Failure parsing mirror status 
fraction: 1 core".

Any ideas?

Info:
Kernel 2.6.22.1 Core 2 SMP

LVM version:     2.02.26 (2007-06-15)
Library version: 1.02.20 (2007-06-15)
Driver version:  4.11.0

    Finding volume group "raid1"
    Archiving volume group "raid1" metadata (seqno 11).
    Creating logical volume pvmove0
    Moving 22538 extents of logical volume raid1/backup
    Found volume group "raid1"
    Updating volume group metadata
    Creating volume group backup "/etc/lvm/backup/raid1" (seqno 12).
    Found volume group "raid1"
    Found volume group "raid1"
    Suspending raid1-backup (253:3) without device flush
    Found volume group "raid1"
    Creating raid1-pvmove0
    Loading raid1-pvmove0 table
    Resuming raid1-pvmove0 (253:9)
    Found volume group "raid1"
    Loading raid1-pvmove0 table
    Suppressed raid1-pvmove0 identical table reload.
    Loading raid1-backup table
    Resuming raid1-backup (253:3)
    Checking progress every 15 seconds
  Failure parsing mirror status fraction: 1 core
  Failure parsing mirror status fraction: 1 core
  ABORTING: Mirror percentage check failed.