Thumbnail hover markup not appearing

Hi.
I'm having a a strange problem with views slideshow. Basically, I have a slideshow view using Thumbnail hover, and the markup for the breakout teaser is printing an empty div, but NOT in Firefox.

So... In FF one of the breakout teasers looks like this: (currently just the node title)

<div id="views_slideshow_breakout_teasers_1" class="views_slideshow_breakout_teasers">
  <div id="views_slideshow_div_breakout_teaser_1_0" class="views_slideshow_div_breakout_teaser views_slideshow_active_teaser">
  <div class="views-field-title">
                <span class="field-content"><a href="/article/2009/03/12/villain-bernie-wizard-wallstreet-madoff-goes-jail">Villain Bernie &quot;The Wizard of WallStreet&quot; Madoff goes to jail</a></span>
  </div>
</div>

But in IE, Opera, Safari, etc, the view outputs an empty div, like this:

<div id="views_slideshow_breakout_teasers_1" class="views_slideshow_breakout_teasers"> 
  <div id="views_slideshow_div_breakout_teaser_1_0" class="views_slideshow_div_breakout_teaser views_slideshow_active_teaser"> 
  </div>

I'm also (sometimes) getting a seemingly random ajax plugin style error when editing the view.
I'm using views 6.x-2.3 and views slideshow 6.x beta1
I currently have the view as a block at http://www.graphicsilence.com
Any ideas? (thanks in advance)
~Eric