I'm not sure as to what cause that particular package to fail the upgrade. However, I'd like to point out that Ubuntu 6.10 (Edgy) was released a few days ago. You might wanna try upgrading to that release instead.
-- Upgrade from Breezy to Dapper aborted https://launchpad.net/bugs/68726 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs