After I upgraded from EE 2.5.2 to 2.7.2, my site is not loading when “www” is part of the domain name. It only loads if the domain is without ‘www’ (e.g. http://mydomain.com). My .htaccess file is the same, nothing has changed except for the upgrade. I reinstalled my backed up 2.5.2 EE files and database and now everything is working fine. Any idea why upgrading to EE 2.7.2 will not allow my site to load with the “www” as part of the domain name?