Hi, don't know, if its a bug of jQuery or of the browsers itself, but it seams that $.each() runs in reversed order on objects using Chrome or Opera (Firefox, Safari & IE8 seems to do it right). Here my shortend example:

<div id="container"></div>
<script>	
var container = $('#container');
var data = {
	"3" : {"nr":1},
	"2" : {"nr":2},
	"1" : {"nr":3}
	};	
$.each(data, function(k,e){
	container.append('<span>'+e.nr+'</span>,');
	});
</script>

Chrome & Opera displays: 3,2,1,

The others: 1,2,3,

Using it with ajax and json will bring some strange behavior here and there. If an simple array with inner objects is used (like [{"nr":1},{"nr":2},{"nr":3}]) all will be right.