Blank HTTP page with Directory Assistance authentication when password is remembered AND incorrect

We use Directory Assistance to provide Basic Authentication via HTTP. When the user password is saved or remembered by the browser, and that password is incorrect, the browser displays a blank page with no error, and no prompt to re-enter the password.

If the user clears saved passwords from the Browser, the correct login prompt appears. If the password is entered incorrectly 3 times, the error 401 is displayed. However, when the user selects to save the password, and enters an incorrect password (or returns to the site when the password is expired) only a blank page with HTTP headers status 200 appears. We need Domino to produce an ‘incorrect password’ or new authentication prompt, instead of just this blank page.

Thanks in advance.

Subject: Blank HTTP page with Directory Assistance authentication when password is remembered AND incorrect

are you using session based authentication or standard?

Subject: RE: Blank HTTP page with Directory Assistance authentication when password is remembered AND incorrect

I am using standard, not Session-based, and not SSL.

Subject: RE: Blank HTTP page with Directory Assistance authentication when password is remembered AND incorrect

I have resolved this using domcfg.nsf using Single Server Session-based authentication. By using an HTTP form-based instead of basic authentication it appears this bug is worked around. But any ideas on what could have caused it?