Somehow, I changed a setting that tells Preview where to go. I have two domains, hosted under the same hosting account. Instead of going to: http://www.hosteddomain.com/seconddomain, somehow I have set it up to go to http://www.hosteddomain.com/seconddomain.COM - which takes me to an error page on the hosteddomain site.
I'm sure the problem is that I erroneously typed that second .com - just don't know where to go to fix it!
Thanks!
Barbara