I just uploaded ubuntu3 version of mdadm that address this problem. It should be available in the archive within a few hours.
Fabio ** Changed in: mdadm (Ubuntu) Status: Confirmed => Fix Released -- System does not boot anymore https://launchpad.net/bugs/59066 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs