After the latest PR update my http ://www.domain. com became a PR4 , but I realized that when I go to a subpage on my site and then click the home page link again it goes back to http ://domain. com . Now I checked the ranks in the SERPs and realized that all my rankings are for http ://domain. com and not http ://www.domain. com . I am lost. So I got SERPs from one domain but all my link building efforts went to the http ://www.domain. com which I have no rankings on . Did I do anything wrong ? I am thinking I need to do a 301 redirect , but not sure how or if I have to do it at all . Your help is very much appreciated ! stojan