getting NaN errors with aicc + ajax

Thanks a bunch Jason! During the past couple hours, I was able to prove that all the course exhibiting this issue in fact were published to use AJAX rather than Java. You nailed it.Fortunately, we have only a limited number of courses that have been published to using this setting, so I think we may end up simply republishing most if not all of them and upload the new content files. However, I'll definitely add that line to one of our courses and test as an alternate fix. Thanks again for your time.