The last 2 of the 4 messages are not from JFBConnect. I'm not sure what's causing those. The first 2 issues have been fixed in the latest JFBConnect v6.0 release.
I'd recommend upgrading to the latest version if you want those notices removed (as well as taking advantage of a lot of new
Joomla social networking
features). However, an upgrade isn't necessary since those are simply PHP notices and not errors. You can set Error Reporting to "None" in the Joomla Global Configuration area to hide them as well.
I hope that helps,
Alex
Strict standard errors after changing server
