Hi,
the walk through gamer mode does not properly work when using the new Multiple View Panes.
It seems that when one is "walking" and guiding oneself with the mouse, as soon as the mouse goes over another of the view panes an error occurs. It's difficult to explain. But it's very easy to experience. Just open a document which you can gamer walkthrough, then click Multiple View Panes and in one of your view panes activate the Walkthrough Gamer Mode, you'll immediately see the problem that occurs.
Hope this gets fixed soon!