On your website you say to modify the <html> tag to be this:
<html xmlns="http://www.w3.org/1999/xhtml" dir="ltr" lang="en-US" xmlns:og="http://ogp.me/ns#" xmlns:fb="http://ogp.me/ns/fb#">
Mine is missing this part:
html xmlns="http://www.w3.org/1999/xhtml" dir="ltr"
And it has this additional part:
prefix="og: http://ogp.me/ns# fb: http://ogp.me/ns/fb#"
It appears that I need to change my <html> tag, but I don't know how/where to do that...
FB comments is working (although I don't get any notifications - but that is probably because my fb:admin id was missing until just now, although I'm listed as an admin in the app itself).
Thanks. It's a great plugin and has really livened up my communications with my readers.