Vertical slides broken

[hypery2k]

When having vertical slides the numbering is broken:

 <section >
                <section><h2>Vertical Slide 1</h2>Vertical Slide 1</section>
                <section><h2>Vertical Slide 2</h2>Vertical Slide 2</section>
            </section>

But it should be:

[denehyg]

The slide numbering scheme matches what reveal.js uses so the first slide is supposed to be 5.1.