I was able to reproduce this issue upgrading from 6.06LTS to 6.10. Deleting the K09samba symlink and running sudo apt-get install -f allowed me to continue w/ the upgrade process.
-- Samba fails to upgrade with dangling K09samba symlink https://launchpad.net/bugs/48082 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs