Thanks,
John Payne
I can confirm that Opera 9.61/W98 will successfully handle the response
HTTP/1.1 401 Authorization Required
...
WWW-Authenticate: Basic realm="<prompt censored>"
...
by sending a valid Authorization header and Credentials with the next GET.
However it doesn't send any Authorization header or Credentials in response to
HTTP/1.1 401 Authorization Required
...
WWW-Authenticate: Negotiate
WWW-Authenticate: NTLM
WWW-Authenticate: Basic realm="<prompt censored>"
...
Although a proxy is available, these transcripts are direct intranet
connections. It may (or not) be relevant that the first server is Apache and
the second IIS6.
hth
/df