This is a great plugin you've developed and we're happy to be using it on our site.
Just to let you know of an error I've come across today. If I'm logged into facebook and then I switch my account to assume the Admin of a page and I then go to my wordpress blog to make a comment I am confronted with this UI issue:
As you can see, the facebook iframe becomes so big that it covers the form! With firebug, I found that the iframe goes to 1000px by 1000px for some reason.
Any suggestions to fix this?