We just updated some of the modules to make calls from our new system plugin. This allows you to place the modules anywhere on your site manually or by using the modules.
To fix the above, please make sure you download the plg_system_jfbcsocial_j1.5_v3.0RC1.tar.gz file in the download area, install it, and enable it. That should clear up your problem.
We'll be improving the documentation for these plugins and 3.0 in general as we release the stable versions of all extensions. However, if you'd like more information on the plugin and how you can use it, check out the following post:
www.sourcecoast.com/forums/topic?id=1199&p=1#p4379 
JFBCShare Module Not Appearing
