FB Connect Button Disappearing

I couldn't find the login module on your dev site you posted. However, when the button dissappears, it's usually when there's a javascript error on the page. The FB libraries are very js based, so if there's an error in any other module, or Mootools is being prevented from loading, this can cause an issue like your seeing.

Let us know if this helps, or if you continue to run into issues.

There isn't Javascript that checks that directly, but when you're testing on different domains, you need to make sure that you've updated your Facebook Connect URL (or create a new demo app with a new URL to test with).

Hope this helps, let us know if you run into any additional problems.

mtatem: Did you fix your issue? I'm seeing the FB Connect button now. Though, I am getting the cross-domain receiver error if I follow your link. Try reading this post to fix that problem:
<!-- m --><a class="postlink" href="www.cmsmarket.com/forum/index.php?f=38&t=102&rb_v=viewtopic">www.cmsmarket.com/forum/index.ph ... =viewtopic

Generally, if a template fixes the problem, it's because the 'bad' template is doing something it shouldn't be with Mootools. Either not allowing it to be loaded, or including a different version than what comes with Joomla. Try looking into that, and if you need help, just let us know.