I'm finding an oddity in the SERPS that I can't explain. So far just two of my pages (that I am aware of) that are number one in the SERPs are now getting a server not found message because the link goes to a non existant site. My website had two sections. One was html only and the other was the osCommerce shopping cart site that uses PHP. The html section used the www.mywebsite.com URL. The osCommerce used the mywebsite.com URL. I asked my host to please make the whole site have just one name, so he renamed the mywebsite.com by adding the www. But now I am finding links in the SERPS that should never have existed. They are from the html section of the site, but the URL is the mywebsite.com. So, they are getting a server not found message when clicked. But that URL should never have existed anywhere. How could it have been picked up by the search engines? I had my host change the name because of duplicate content issues, since the Search Engines thought my one site was two sites with duplicate content. Now I am having problems with Server Not Found messages. Can this be solved in htaccess? How can I fix these Server Not Found issues?