Hi,
I am not champ as far as scripts are concerned but checking the source on your site and comparing it to mine I found that you use some other css classes when it comes to dates. You have something like:
<span class="rt-date-posted">
Posted on<span>Aug 24, 2010</span>
while on my Grunge page where the content date is I have:
<div class="contentdate" >
<span class="createdate">06.04.2008</span>
<div class="rt-article-content">
so to me it looks that you have messed something when installing the template. If I were you I would make a clean install of the latest Joomla, then install Grunge together with Gantry.
regards,
Jacek