After updating to 8.1.0 and restoring domains from a backup, I cannot access any of the websites using a "www" prefix. Restoring DNS with the "use www" check box marked and/or using the group operations "enable www" both produce no change. I tried editing the httpd.conf files, but they don't seem to tell the whole story. I have successfully manually added "ServerAlias www.domain" and "UseCanonicalName On" with one of the domains (which then worked), but the same thing failed to yeild any results with another domain. What's going on?