I have a similar problem on version 1.99-14 (currently on testing) I upgraded grub-pc 1.98+20100804-14+squeeze to 1.99-14. On upgrade, grub failed to install on /dev/md-0 . That left the system unbootable.
All / is on LVM. The LVM partition is a recent one (created on squeeze). I downgraded to 1.98 and it solved the problem (it installed sucessfuly on /dev/md-0 ). -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org