in http.log:
whars0ck.europe.nortel.com - 0502164 [18/May/2004:10:04:28 +0100] "GET /~callum/cgi_test/test.cgi HTTP/1.1" 500 403

in http-error.log:
[Tue May 18 10:04:28 2004] [error] [client 47.165.6.42] Premature end of script headers: /u/callum/public_html/cgi_test/test.cgi