erro do grub “membro supérfluo do RAID” no update-grub

Meu sistema (wheezy / sid: 2.6.32-5-amd64 # 1 SMP x86_64 GNU / Linux) está funcionando bem - só estou me perguntando o que significam algumas mensagens. Eu tenho duas matrizes mdraid sendo executadas no meu sistema. Aqui está cat /proc/mdstat:

Personalities : [raid1] [raid6] [raid5] [raid4] 
md1 : active (auto-read-only) raid5 sda3[0] sdc3[3] sdb3[1]
      823103488 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]

md0 : active raid1 sda2[0] sdc2[2](S) sdb2[1]
      72628769 blocks super 1.2 [2/2] [UU]

Eu uso /dev/md0como /e /dev/md1como /home. Sempre que update-grupestá sendo executado - ou enquanto grub surge, eu recebo o erro: error: superfluous RAID member (2 found)..

Para entender por que eu gostaria de remover isso, veja o resultado de update-grub:

error: superfluous RAID member (2 found).
error: superfluous RAID member (2 found).
Generating grub.cfg ...
error: superfluous RAID member (2 found).
error: superfluous RAID member (2 found).
error: superfluous RAID member (2 found).
error: superfluous RAID member (2 found).
error: superfluous RAID member (2 found).
error: superfluous RAID member (2 found).
error: superfluous RAID member (2 found).
error: superfluous RAID member (2 found).
error: superfluous RAID member (2 found).
error: superfluous RAID member (2 found).
error: superfluous RAID member (2 found).
error: superfluous RAID member (2 found).
error: superfluous RAID member (2 found).
error: superfluous RAID member (2 found).
error: superfluous RAID member (2 found).
Found background image: /usr/share/images/desktop-base/desktop-grub.png
error: superfluous RAID member (2 found).
Found linux image: /boot/vmlinuz-2.6.32-5-amd64
Found initrd image: /boot/initrd.img-2.6.32-5-amd64
error: superfluous RAID member (2 found).
error: superfluous RAID member (2 found).
error: superfluous RAID member (2 found).
error: superfluous RAID member (2 found).
error: superfluous RAID member (2 found).
  No volume groups found
done

Como posso me livrar dessas mensagens?

Este é um erro no script update-grub. Após o que é dito no relatório de bug do Debian, um patch foi aplicado a montante, portanto deve ser corrigido no pacote Debian em algum momento.