In reply to Peter.

Peter, this is untrue: copy&paste mistakes happen to everyone. I regularly come across blog posts by seasoned web professionals, which contain links that are malformatted in the http://http://example.com way (where the URL that was pasted without first deleting the http://) or in the example.com/www.example.org way (where the http:// part was is missing).

I have always been hoping for the WordPress editor to "spell-check" such common mistakes.