Hi,
That page didn’t work for me in any browser.
It seems like maybe the AJAX call to get the map data isn’t working. MapPress calls the blog’s AJAX handler here:
http://regionalsadmin.burningman.com/wp-admin/admin-ajax.php
Normally that should just return ‘0’, but it’s returning the entire home page (you can try it – just enter it in your browser). Is there some kind of redirect from the theme or another plugin? Or is the AJAX url incorrect?
If that doesn’t help, then it would help if we could rule out conflicts:
1. Deactivate ALL of your other plugins
2. Switch to the standard 2012 theme
3. Go to your ‘permalinks’ settings and save them again (to update the .htaccess file)
4. Check that page again – if the issue seems to be resolved, reactivate until you find the conflict.