Another reason to dislike Internet Explorer

Internet explorer caches GET requests, but other browsers do not, so you end up having to work around that by adding a current timestamp to the request URL to fool IE into thinking it's a new URL and so not read the result from the cache.

In JQuery that looks like ("global"):

$.ajaxSetup({ cache: false });

or single-call:

$.ajax({url: "myurl", success: myCallback, cache: false});

See: http://stackoverflow.com/questions/367786/prevent-caching-of-ajax-call