The continuous reboots also happen with regular PC partitions when the first drive of a raid 1 fails and grub2 should boot from the second drive. http://debianforum.de/forum/viewtopic.php?f=13&t=127837
The workaround is to enable GRUB_TERMINAL=console in /etc/default/grub -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org