Created Unassigned: AJAX TabContainer ActiveTabChanged not firing on __doPostBack [27699]

We recently upgraded our AJAX Control Toolkit from v4.1.7.0607 to v4.1.7.1213 and for the most part things are working fine, except for the TabContainer that we have been using.

Originally we were making use of OnClientActiveTabChanged="EditJobActiveTabChanged" event to handle a postback

function EditJobActiveTabChangedII(sender, e)
{
ShowMessageDiv('cphMainContent_upEditJob');

var strPreviousTabIndex = 0;
var strNewTabIndex = 0;

strPreviousTabIndex = strNewTabIndex;
strNewTabIndex = sender.get_activeTabIndex();

__doPostBack('cphMainContent_tbcEditJob', sender.get_activeTab().get_headerText());
}