When making an ajax request and a response code of 303 is returned, the browser automatically redirects to the uri provided in the Location header without notifying the javascript layer. This make sense for thing like a 301 or 302. But in the RFC-2616 it states "The new URI is not a substitute reference for the originally requested resource."

As such, to me it doesn't make sense that if I request resource A, that I will be given resource B without any way of knowing that my request for resource A redirected to resource B. Instead I feel that after resource A returns a 303, I should be given the option to intercept it and decide if I want to retrieve resource B. I don't have a problem with the default being automatically following, but I think I should be able to checkout the situation and make a decision here since we are talking about 2 different resources which are not substitutes.