That's very strange... I have a few suggestions and a few questions:
Things to check:
* Disable JomSocial's integration by removing the API/Secret keys from their Facebook Connect area. There should only be one Facebook Connect extension running on your site or Facebook can get confused
* You seem to have a mix of hard-coded www vs non-www links. The contact-us form, in particular is always non-www. The rest seem to be based off whatever the current page is. This isn't normally an issue, but please check that your Facebook application is configured with the following settings:
Site URL:
www.vetawarenesscoalition.com/
Base URL: vetawarenesscoalition.com
* There's a few Javascript errors on your page dealing with your Digg links. I'm not sure how those are being inserted, but if you can (temporarily) disable the Digg stuff to see if that fixes it, that'd be great. I don't think this is the cause, but worth a shot.
* Make sure the JFBC Authentication and JFBC User plugins are published
If none of the above help or ring any bells, can you try enabling the "Show Facebook API Errors on Front-End" setting in the Facebook API configuration tab and see if there are any errors reported when trying to login? Also, what SEF extension are you using? Every once in a while, there's some special settings you may need to use if not using the built-in Joomla core SEF.
Hope this all helps get you going, and no problem about the support. It's what we do, and thanks for your subscription so that we can do it!
Alex