Office challenge: What to do when you can't get a looping introduction to stop?

This week, test your PowerPoint skills by troubleshooting an introductory loop that doesn't know when it's time to quit.

One of your users added an introductory loop to a presentation, using the instructions at Add a looping introduction to a PowerPoint presentation. Unfortunately, she can't get the introduction to stop running. Clicking the action button that's supposed to skip to the first slide in the actual presentation doesn't work. Can you help her troubleshoot this problem - what are the most likely reasons for this misdirection?