Facebook login : works without WWW but not with WWW

[Dave]

If you use http://cdjw.org/forums/ as your main URL, setup a 301 redirection rule in .htaccess to redirect www to the non-www version of your site.

RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^(.*)$ http://%1/$1 [R=301,L]