This is a problem with that mirror not being up-to-date at the moment, rather than a bug in Ubuntu. You may have tried updating while that mirror was in the middle of an update.
** Changed in: Ubuntu Status: Unconfirmed => Rejected -- Update failure problem https://launchpad.net/bugs/55265 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs