URL variations
I use the function "Use URL variations"
I always write the URL in the URL field as http://mydomain.com
I get some variation as HTTP://mydomain.com but never variations as www.mydomain.com , mydomain.com or http://www.mydomain.com
Comments
variations will be...
HTTP://www.domain-name.com
http://www.Domain-Name.com
http://Domain-name.com
...
If you don't have www. in the original URL, it will not add it as usually this is not working if you have already subdomains. Also remember that browsers correct the domain name case when you hover over it. They make it all lowercase.