The WP diagnostic tool confirms that the CNAME is set correctly, and traffic is being redirected to my WordPress blog correctly. But I get a "Server Not Found" error about 90% of the time.
I have received complaints from friends/clients also that the blog URL is not working. In many cases, I cannot view published pages linked from within the WP publishing tool -- making it impossible to update the blog.
The original URL: Vientreenalquiler.wordpress.com
the mapped domain: blog.SensibleSurrogacy.com
Blog url: http://vientreenalquiler.wordpress.com/