I'm using WP 3.2.1 with the 2011 theme.
I have run into a problem, in that when you attempt to post a comment using FB it doesn't seem to be picking up the name and email fields from FB and subsequently fails. I've tried following your mini guide to resolve the problem, but to no avail. Also, since this is a new theme, your guide says I shouldn't have to add that additional div tag to the comments.php. I also tried making name and email non-required fields, but then someone logged in via FB only comes up as anonymous, which is also no good...
Your help would be much appreciated!