Google Chrome problem with changing password

Question

I have a colorbox on the page that makes the user password change, it works normally, but I do not know why sometimes the Google Chrome of some bug and does not perform this change, as an example I tried to change the password of the same user on Google Chrome (anonymous mode) and Google Chrome Canary (anonymous mode).

Canary did not execute the change, in which no return of ok message or error, already in Google Chrome changed.

Sometimes the cache cleaning on other machines that also give this problem, solves, but it is not always, and the user have to be cleaning at all times the cache is something degrading.

Script of colorbox:

$(document).ready(function() {       
    $("form[name='formulario']").validate({
        // Especifica as regras da validação
        rules: {
            senha_1: {
                required: true,
                minlength: 5
            },
            senha_2: {
                required: true,
                minlength: 5,
                equalTo: "#senha_1"
            }                   
        },
        messages: {
            senha_1: {
                required: "<?=TXT_VALIDATE_MSG_SENHA?>",
                minlength: "<?=TXT_VALIDATE_MSG_SENHA?>"
            },
            senha_2: {
                required: "<?=TXT_VALIDATE_MSG_REPITASENHA?>",
                minlength: "<?=TXT_VALIDATE_MSG_REPITASENHA?>",
                equalTo: "<?=TXT_VALIDATE_MSG_SENHA_DIFERENTE?>"
            }
        },
        submitHandler: function(form) {
            form.submit();
            parent.$.fn.colorbox.close(); 
            parent.location = parent.location;
        }
    });
});

Part of POST and SESSION that runs on Submit

    $idProprietario = Entrada::Int('id');
$nome = Entrada::String('nm');
$email = Entrada::String('email');
$senha = Entrada::String('senha_1');
////////////////////////////////////////////

////////////////////////////////////////////
//                 UPDATE                 //
if ($conexao->consulta("UPDATE proprietario SET senha = '".base64_encode($senha)."' WHERE idProprietario=".$idProprietario)) {
    $_SESSION['msg'] = "ok|".TXT_ACAO_ADMIN_SENHA_ALTERADA;
} else {
    $_SESSION['msg'] = "erro|".TXT_ACAO_CADASTRO_ERRO_SQL;  
}