Did you access it through the control panel, or you linked:
http://www.byzcath.org/forums/admin/phpinfo.phpOr as I typed above (which has an additional string that populates that value in the page):
http://www.byzcath.org/forums/admin/phpinfo.php/testIf no /test it will not have "path_info" set (as the path would be blank, as per your link).
You didn't answer my question regarding .htaccess files in these folders:
/home/byzcatho/public_html
/home/byzcatho/public_html/forums/
You mentioned installing 7.7.1, I am not seeing that you're running that release either in your forum footer or the test script; did you run the upgrade utility through the complete upgrade process?