When updating your Profile, you may see a “Please enter a valid URL” on a website entry where you’re sure what you entered is valid! It wants a complete URL, beginning usually with “http://”. An example: http://www.methenysystems.com. If you get the error message, please check that the http header is there.
If you wonder why this is necessary, WordPress expects a URL without the http to be a partial URL to get added to an internal site URL. It assumes it’s supposed to be part of the ACGA site. The http header tells it that it is an external site.