seems like 123box.co.uk returns broken response with HEAD request. The following session ensures it.

% telnet www.123box.co.uk 80
Trying 212.67.197.196...
Connected to ns.123box.co.uk.
Escape character is '^]'.
HEAD / HTTP/1.0
Host: www.123box.co.uk

Connection closed by foreign host.
[download]

--
Tatsuhiko Miyagawa
miyagawa@cpan.org