[Plugin: WP-FB-AutoConnect] Log in status in facebook (after wp logout) IE&Safari error

I noticed that after I Log out from wordpress site.. I’m still logged in Facebook. (even if I haven’t been in Facebook at that time) This may be security threat in public computers etc.

version: wp-fb-autoconnect.1.5.0

I also noticed login with Internet Explorer 8.0 and Safari 5.02 end with error:
“Error: Failed to get the Facebook session. Please verify your API Key and Secret.”

https://www.ads-software.com/extend/plugins/wp-fb-autoconnect/