$(document).ready is firing twice for me now in IE5.5 and IE6. Here is a very simple test page:

​http://kelvinluck.com/assets/jquery/test/

Am I meant to do something extra to stop it being called twice?

I think you'll need a bit more logic around your xhr status checking so that things like a 304 don't trigger the onError method. dojo's doLoad() method is pretty full-featured in this regard.

Memory leaks are detected by the extension Leak Monitor (​https://addons.mozilla.org/firefox/2490/) when one uses event ready().

Install it and load pages from jquery.com. It'll pop up this kind of message: (Leaks in window 0x2d27dd0: [+] [leaked object] (3d7d950, ​http://proj.jquery.com/js/jquery.js, 14-14) = function () {

if ($.$$timer) {

clearInterval($.$$timer); $.$$timer = null; for (var i = 0; i < $.$$ready.length; i++) {

$.apply(document, $.$$ready[i]);

} $.$$ready = null;

}

}

[ ] $$guid = 1 [ ] prototype (2c59268) = [object Object]