I just had a look and there is a problem on your site, but I have the feeling that you have a corrupt joomla installation.
Can you test it with a clean joomla installation? (the one you have came with the template or am I wrong?). The problem are the modules on the dashboard. If you go to the module manager -> administrator -> then disable the hotspots modules the dashboard is loading just fine. But whenever I add the modules that show on the right of the dashboard the page just dies.
I've tested it on joomla 2.5.9, 2.5.10 here and I cannot reproduce the bug. Can you help me a little?