Chartset encoding when using Ajax ? JQuery

I have a web application (UTF-8) in which the following one can be used to send to the server side

áéíóú
àèìòù
ÀÈÌÒÙ
ÁÉÍÓÚ

Ok. I use something like as follows to send data

// Notice $("#myForm").serialize()
$.get("/path?", $("#myForm").serialize(), function(response) {

});

When i see my recordSet, i get (database charSet encoding is UTF-8)

áéíóú
à èìòù
ÃÉÃÓÚ
ÀÈÌÒÙ

Even when using $.post, i get the same result set

After seeing serialize() method in JQuery in Action book:

Creates a properly formatted and encoded query string from all successful form elements in the wrapped set

But, as shown above, it does not appear to work fine. So instead of serialize() method, i use

var objectArray =  $("#myForm").serializeArray();

var queryString = "";
for(var i = 0; i < objectArray.length; i++) {
    queryString += "&" + objectArray[i]["name"] + "=" + objectArray[i]["value"];
}

$.get("/path?" + queryString, null, function(response) {

});

Now i get in database

áéíóú
àèìòù
ÀÈÌÒÙ
ÁÉÍÓÚ

So Am i missing something when using serialize() method ? Why serialize() method does not work as expected ?