[arch-general] can't unlock a luks encrypted partition. (urgent).

[solsTiCe d'Hiver]

it has been sometime ago

# grep cryptsetup /var/log/pacman.log 
[2008-07-16 11:03] upgraded cryptsetup (1.0.6-1 -> 1.0.6-1)
[2008-10-08 14:29] upgraded cryptsetup (1.0.6-1 -> 1.0.6-2)
[2009-06-19 21:52] upgraded cryptsetup (1.0.6-2 -> 1.0.6-3)
[2009-08-10 14:52] upgraded cryptsetup (1.0.6-3 -> 1.0.7-1)