Steps to regenerate:
1) Register as a new customer or log in using valid customer credentials on e-commerce (https://demo-trunk.ofbiz.apache.org/ecommerce).
2) Add any item to cart. (I added GZ-1000 (Tiny Gizmo)
3) After adding the item click on "View Cart" from top of the screen. Shopping cart detail will be displayed.
4) Click on the Checkout button. A screen will appear to select shipping address and other detail.
5) Click on New Address link from the "Where shall we ship it?" section. A screen with the name "Create New Contact Information" appears.
6) Now click on the "Go Back" button to go back to the previous page. 404 error appears with the message "The requested URL /ecommerce/control/checkoutshippingaddress was not found on this server."