Netscape 6 and Mozilla 1.0 RC1 and earlier allows remote attackers to determine the existence of files on the client system via a LINK element in a Cascading Style Sheet (CSS) page that causes an HTTP redirect.
http://www.redhat.com/support/errata/RHSA-2003-046.html
http://www.redhat.com/support/errata/RHSA-2002-192.html
http://www.iss.net/security_center/static/8977.php
http://online.securityfocus.com/archive/1/270249
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000490