I understand that you had an unclean system when trying an upgrade (and an unofficial repository listed), so I'm rejecting this bug because of that. If I've misunderstood, please reopen.
** Changed in: update-manager (Ubuntu) Status: Unconfirmed => Rejected -- Could not install libc6_2.4-1ubuntu12_i386.deb https://launchpad.net/bugs/71521 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs