[accordion] 1.6 rc 4 and 5 - assignment of selected class (both default and selectedClass) assigns it to the wrong div

[accordion] 1.6 rc 4 and 5 - assignment of selected class (both default and selectedClass) assigns it to the wrong div


Hi,
as in subject, assignment of selected class to the active accordion
element (both default and via selectedClass) assigns it to the wrong
div, actually to the accordion content div.
It works as expected with ui 1.5.3 .
div structure:
<div class="content-box">
                <div id="test-accordion" class="accordion">
                    <div class="accordion-item">
                        <div class="accordion-toggle">Introduction</div>
                        <div class="accordion-content">
                        </div>
                    </div>
                    <div class="accordion-item">
                        <div class="accordion-toggle">Introduction</div>
                        <div class="accordion-content">
                        </div>
                    </div>
                </div>
</div><!--END .content-box !-->
and how I trigger the accordion:
         jQuery(document).ready(function () {
                 jQuery("#test-accordion").accordion({
                    header: "div.accordion-toggle",
                    fillSpace: true,
                    active:"div.accordion-toggle:first"
                });
        });