jQuery tooltip plugin - fade is null or not an object

Question

I am using the jQuery tooltip plugin. I have a template with a few HTML controls, which I load when I click on a button (after page load). When I bind the template with data, I call the BindTooltip method that binds the tooltips to the above set of controls.

$("#btnAddCity").tooltip({
    bodyHandler: function() {
        return 'Add city here';
    },
    delay: 100
});

The problem comes when I try to empty data in my template and rebind it with different data. I am getting the JavaScript error:

fade is null or not an object

Below is the code from tooltip.js and settings(current) is undefined when I try to empty and rebind my template data. Am I missing anything here?

// Delete timeout and show helper
function show() {
    tID = null;
    if ((!IE || !$.fn.bgiframe) && settings(current).fade) {
        if (helper.parent.is(":animated"))
            helper.parent.stop().show().fadeTo(settings(current).fade, current.tOpacity);
        else
            helper.parent.is(':visible') ? helper.parent.fadeTo(settings(current).fade, current.tOpacity) : helper.parent.fadeIn(settings(current).fade);
    } else {
        helper.parent.show();
    }
    update();
}