I am using a shared web hosting service. Running phpinfo, I can see the Server API shows CGI/FastCGI rather than Apache 2 Handler.
In this article: http://docs.joomla.org/Should_PHP_run_as_a_CGI_script_or_as_an_Apache_module%3F
It says 'If your server is configured to run PHP as an Apache module, then you will have the choice of using either php.ini or Apache .htaccess files, however, if your server runs PHP in CGI mode then you will only have the choice of using php.ini files locally to change settings, as Apache is no longer in complete control of PHP.'
I think it's really strange that the rewrite rules in the .htaccess that I created have been working perfectly while it's running in CGI mode. Why is this happening?