jQuery UI-手风琴显示问题

http://jsfiddle.net/frEWQ/4/

1. JS没有将.ui的角全部应用到H3,在它下面的“kwick”div完成折叠后,在动画之后给出了一个奇怪的截止边界

有什么建议吗?

谢谢

        // find elements to show and hide
    var toShow = clicked.next(),
        toHide = this.active.next(),
        data = {
            options: o,
            newHeader: clickedIsActive && o.collapsible ? $([]) : clicked,
            oldHeader: this.active,
            newContent: clickedIsActive && o.collapsible ? $([]) : toShow,
            oldContent: toHide
        },
        down = this.headers.index( this.active[0] ) > this.headers.index( clicked[0] );

    this.active = clickedIsActive ? $([]) : clicked;
    this._toggle(toShow, toHide, data, clickedIsActive, down);

    // switch classes
    this.active.removeClass("ui-state-active ui-corner-top").addClass("ui-state-default ui-corner-all")
        .find(".ui-icon").removeClass(o.icons.headerSelected).addClass(o.icons.header);
    if (!clickedIsActive) {
        clicked.removeClass("ui-state-default ui-corner-all").addClass("ui-state-active ui-corner-top")
            .find(".ui-icon").removeClass(o.icons.header).addClass(o.icons.headerSelected);
        clicked.next().addClass('ui-accordion-content-active');
    }

    return;