Created Issue: Tab container inside accordion - javascript tab select error [27051]

with latest November update, tab container inside of an accordion is throwing a javascript error on page load trying to select tab.
[code]
_setFocus: function (obj) {
$get("__tab_" + obj.get_element().id).focus();
},
[/code]

This may be a result of another issue i see posted of the Tab change code always firing.

Tabs in this case are being dynamically loaded into an accordion pane that isn't visible on load.