1) The "Enable CDN" property should be a checkbox
2) The URL has an extra period in it after the 1.7.1 (1.7.1.), so it's a 404 if someone enables it.
3) Enabling it causes the backend Content items to fail with jQuery undefined errors
Enabling the MSAjax CDN also generates backend errors
This is a bug that causes the whole CDN functionality to break. Here is the issue in PITS.Kind regards,