2 Things:
First, with 3.0.2, we added a JFBCSystem plugin. Please enable that to see if it resolves your issue. We haven't made it a 'required-enabled' plugin yet, but likely will in the 3.1 release.
Second, if you're using JFBCShare, please try to disable it. We're hearing reports of conflicts with the Share module and are investigating.
Thank you