This url: http://programmers.stackexchange.com/q/165971?atw=1
redirects to , /questions/165971/how-is-architectural-design-done-in-an-agile-environment
According to the http spec , this should be:
The field value consists of a single absolute URI.
My twitter client detects the redirect, and opens the browser at the redirected url, without the host, so the page doesn't load.