Comment 8 for bug 331558

This bug is related to bug 316872, specifically note: https://bugs.launchpad.net/ubuntu/+source/grub/+bug/316872/comments/16

A new upgraded version of grub does not automatically install the new grub stage 2 that contains the ext4 support. Apparently grub-install is not generally something that's safe to run automatically on upgrades. I believe the upgrade from ext3 to ext4 and the re-running of grub-install will be put into the Jaunty release notes.