Raptor2m on "[Plugin: WordPress MU Domain Mapping] Home page not loading"

I am using this plugin to map domains to the sites in WP multisite. On one site, the home page always loads as a blank page. The other pages on that site work fine, and if I add /? at the end of the domain, it loads fine. But the domain name by itself leads to a blank page.

Here is a link: http://condo-alexandria.com/

Any suggestions?

http://wordpress.org/plugins/wordpress-mu-domain-mapping/