EDIT

Anreas Müller suggested to make all URLs fully case insensitive.

The case sensitivity of the can cause problems to users which make mistakes when they write URLs by hand. In case of request parameters which have letters written in de wrong case, the url might not match

the path mathing can be made insensitive by implementing an case insensitive pathmather:

see http://stackoverflow.com/questions/4150039/how-can-i-have-case-insensitive-urls-in-spring-mvc-with-annotated-mappings

But what about the query parameter names and values?

these must be handled differently