Snippet from vhost config:

        ProxyRequests Off
        AllowCONNECT 443

        <Proxy *>
                Order deny,allow
                Allow from all
        </Proxy>

        ProxyPass / https://localhost:8443/
        ProxyPassReverse / https://localhost:8443/

        #   SSL Engine Switch:
        #   Enable/Disable SSL for this virtual host.
        SSLEngine on
        SSLProxyEngine on

---------------------------

Snippet from error_log:

[Fri Aug 04 13:18:36 2006] [error] [client 192.168.0.55] Invalid method in request \x80g\x01\x03