Bug#586449: severity of 586449 is important

[Colin Watson]

# Automatically generated email from bts, devscripts version 2.10.35lenny7
# temporarily downgrading to allow a new version of grub2 into testing; this doesn't seem to affect LVM users in general, but is specific to this user, so while it needs more debugging attention I don't think it needs to keep a new grub2 out of testing
severity 586449 important