Tony means that one should redirect all traffics to one (either with www. or without
www.)
to not divide up your pr ranking.
your-domain.com should go to
www.your-domain.com
www.your-domain.com should go to
www.your-domain.com
or...
your-domain.com should go to your-domain.com
www.your-domain.com should go to your-domain.com
If your site is using wordpress...
http://txfx.net/code/wordpress/enforce-www-preference/
If your site is not wordpress, add following code into .htaccess file.
Code:
RewriteCond %{HTTP_HOST} ^your-domain\.com$ [NC]
RewriteRule ^(.*)$ http://www.your-domain.com/$1 [L,R=301]
Also, like Tony said, no TITLE tag is big NO NO.