With quicktips disabled (no call to Ext.tip.QuickTipManager.init()), but a 'tooltip' field set on my menu button, I get an exception when clicking the menu button. It's thrown in showmenu:

Code:
// from 4.1.1 RC2
showMenu: function() {
        var me = this;
        if (me.rendered && me.menu) {
            if (me.tooltip && me.getTipAttr() != 'title') {
                Ext.tip.QuickTipManager.getQuickTip().cancelShow(me.btnEl); // BANG
            }
            if (me.menu.isVisible()) {
                me.menu.hide();
            }


            me.menu.showBy(me.el, me.menuAlign, ((!Ext.isStrict && Ext.isIE) || Ext.isIE6) ? [-2, -2] : undefined);
        }
        return me;
    },
Is this a bug?