Since updating to VS2013, we receive this error when running our (MCV4) web app:
The controller for path \'/9ac086a69364466a841e03e001f946fd/arterySignalR/pi
I disabled browser link. Second #4 at this link.
http://blogs.msdn.com/b/webdev/archive/2013/06/28/browser-link-feature-in-visual-studio-preview-2013.aspx