It looks like apt-proxy has indeed been removed from the Ubuntu repository as of Maverick:
http://packages.ubuntu.com/search?keywords=apt-proxy -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/83783 Title: apt-proxy hangs when client aborting download To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt-proxy/+bug/83783/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
