http://http://www.kurzweilai.net/google-announces-calico-a-new-company-focused-on-health-and-well-being?
It occurred to me that perhaps Share is pasting in the URL immediately following the http:// in the Insert Link window. In that window, the http:// is highlighted, and if you right click and paste in the link, it pastes over the http://. If for whatever reason, the http:// is left in and the link pasted after it, the link will not work.