Du skulle virkelig gøre det ene eller det andet. For konsistens såvel som SEO's skyld.
Tving www.
RewriteEngine On RewriteCond %(HTTP_HOST) ^your-site.com (NC) RewriteRule ^(.*)$ http://www.your-site.com/$1 (L,R=301)
Fjern www.
RewriteEngine On RewriteCond %(HTTP_HOST) !^your-site.com$ (NC) RewriteRule ^(.*)$ http://your-site.com/$1 (L,R=301)