It looks like it was fixed by recent updates, but at the expense of breaking LVM (my initramfs does not contain (/scripts/local-top/lvm anymore).
-- initramfs script: race condition between sata and md https://launchpad.net/bugs/75681 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
