I can see you've had many of these requests for help relating to comments not being pulled from FB, and that it's definitely working for WP3.2.1, so I'm sure I've done something wrong. However, I've spent close to 6 hours over several days trying to work out why comments aren't being pulled from FB, to no avail.
I've got Publisher, Sidebar widgets, and Integrate FB Comments enabled.
Automatically Publish to Facebook Application is enabled.
Token checks are green.
So to test, I create a post, and it posts successfully and instantly to the FB App profile page. Then, I add a comment to the FB post. Over 6 hours later, the comment has not been pulled back again.
Could any other plugins, such as Social Connect be interfering? (I wouldn't have thought so).
My webserver host has been a little tempremental over the last 24 hours (a shared webhost). Could this lead to a lack of comment pulling from FB? How often does comment checking and pulling from the FB App profile page occur? How long does it typically take for FB comments to appear on your personal implementations?
Thanks in advance,