yes Alex,
there certainly is a change Google will see this as 2 different sites with the same content
put this in a .htaccess file:
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} !^www.example.com [NC]
RewriteRule ^(.*)$ http://www.example.com/$1 [L,R=301]
maybe change the com also
cheers