RewriteCond %{HTTP_HOST} !^(www\.)?myDomainName\.com$ [NC]
RewriteRule ^(.*)$ - [R=404,L]
edit ^(.*)$ to whatever you want to match.
should work, not tested though.
Hi,
I use the following:
AddDefaultCharset UTF-8
works on all filetypes for me.
headers return text/css; charset=UTF-8
If this doesn't help you could try posting your full htaccess file here.