WCF issues when listening to local host under vista

I got this error on my first real attempt at creating a WCF app using Visual studio 2008 (rtm) and Vista

HTTP could not register URL http://+:4000/test/. Your process does not have access rights to this namespace (see http://go.microsoft.com/fwlink/?LinkId=70353 for details).

Simply running visual studio as an administrator sorted this for me... fairly obvious really!

Ross