duplicate specification of attribute "xmlns:fb"

JFBConnect only adds the following namespaces:
xmlns:og="ogp.me/ns#
xmlns:fb="ogp.me/ns/fb#

If you have the other, that shouldn't be there as the fb namespace above is the one recommended now, we believe (though there is some conflicting information in the Facebook documentation). However, the extra inclusion isn't coming from JFBConnect.

Alex

Both of those lines are in the JFBCSystem plugin (/plugins/system/jfbcsystem.php).

If you're removing that, we'd love to know why you prefer the other tag more.

Thanks,
Alex

Did that solve you're issue? Would like to know what the problem is so we can investigate more if we're possibly doing something wrong or including the wrong namespace..

Thanks,
Alex