When I try to login to your site, I'm seeing your home page come up in the pop-up from Facebook. Is that what you're seeing?
If so, I'd recommend reading this post (especially page 2). It's usually a setting in the Facebook application itself that's causing this, and unfortunately, no one's ever been able to help us narrow it down. If recreating the app with only the basic settings works for you, let us know. If you want to start enabling some other options within the application, please let us know when it 'breaks'. We'd love to have a fix
<!-- m --><a class="postlink" href="
www.cmsmarket.com/forum/index.php?f=38&t...op+up&rb_v=viewtopic">
www.cmsmarket.com/forum/index.ph ... =viewtopic