Hi - Congratulations on the launch of Juicebox!
Thank you!
All is working great on Chrome and Firefox, but when I load my page in IE 8, it loads properly for a second, then the thumbnails vanish.
It looks like your <div id="juicebox-content"> is not closed. Put a closing </div> after <!--END JUICEBOX EMBED-->.
Also, you have an open <p> earlier in your page with no corresponding closing </p>.
You can check your page's code with the W3C Validation Markup Service and fix any errors found.
Once your page validates, it is more likely to be displayed with greater consistency across different browsers and hopefully your IE8 problem will be fixed.