Firefox complains: server has sent an incorrent or unexpected message.
Error Code: -12263.
Apache2 error.log shows: [client ip] Invalid method in request
It all boiled down to a problem with the -DSSL not being passed from the /etc/init.d/apache2 script, to the /usr/sbin/apache2ctl script... As a quick work-around, (until I can really trace it down), I modified the apache2ctl file:
$HTTPD -k $ARGV
$HTTPD -k start -DSSL