jsonpCallback function not working

Question

UPDATE 1:

I've just upgraded from jquery 1.4.4 to 1.6.1. How does that effect the script in the original question?

ORIGINAL QUESTION:

Just as I test, I did:

$(document).ready(function() {
    get_jsonp_feed();

    function get_jsonp_feed() {
        $.ajax({
            url: 'http://www.remote_host.co.uk/feed.php',
            type: 'GET',
            dataType: 'jsonp',
            jsonp: 'callback',
            jsonpCallback: 'jsonpCallback',
            error: function(xhr, status, error) {
                alert("error");
            },
            success: function(jsonp) { 
                alert("success");
            }
        });
    }

    function jsonpCallback(data){
        alert("jsonpCallback");
    }
});

I was expecting to get 2 alerts, the first showing success and the second showing jsonpCallback. But I am only getting the first alert success. Why is the second alert not showing up?

Answer 1

George is correct, set the jsonp param to false -- as of jQuery 1.5 (so, how you set this up is jQuery version dependent). I don't believe that your supplied callback name is invoked as a function (rather, it is the name provided in the URL presented to the server). If you are getting success, then you have received the data. Curious: do you have a hosts entry set up for dev, because I tried to do some testing, and http://www.remote_host.co.uk/feed.php does not resolve for me.