Adding more than one new slides breaks auto slide change

[garrettr]

STR

1. Start with the default slides.md
2. Add a new slide
3. Add an image to the new slide, e.g. ![My Cool Image](http://www.reactionface.info/sites/default/files/imagecache/Node_Page/images/1310497097772.gif)

Expected behavior

If I put the cursor in the new slide text in the editor, Reveal should automatically switch to the corresponding slide. If I then move the cursor to another slide's text in the editor, Reveal should switch to that slide.

Observed Behavior

1. Clicking in the new slide's text switches to the previous slide in Reveal.
2. Clicking in the previous slide does not trigger any change.
3. Auto-switching to earlier slides still works.
4. New slides after the slide with the image also have have broken (offset by 1) auto-switching.

Additional notes

Under further testing, this only happens intermittently. 😖