@rweibull, thanks for sharing! Did you modify anything else besides line 220? I can not determine if it works for my WordPress 3.5. I don’t see any errors and applied your fix as well as (to prevent comment deletion):
line 39
if (is_array($locComments) && is_array($locComments[‘data’]))
TO:
if (is_array($locComments) && is_array($locComments[‘comments’][‘data’]))
and line 43
$helper->import($comments[‘data’], $this->importMode);
TO:
$helper->import($comments[‘comments’][‘data’], $this->importMode);
http://ww.wp.xz.cn/support/topic/plugin-facebook-comments-to-wordpress-warning-invalid-argument-supplied-for-foreach-in-homesafezonedudelolcomw
