Thank you for posting on this issue. I am currently reaching out to the appropriate teams to assist in looking into and resolving this. In the meantime, if you have not already please submit a support ticket via your account at account.dyn.com, or email firstname.lastname@example.org.
Oracle + Dyn
The good news is that mine.nu. has been renewed.
The bad news is that it's been renewed for only one year (?!!!) and that the entry isn't locked.
See you this time next year!
dnssec: unsigned delegation