Here is an odd bug. I'm logged into Facebook under my profile's fan page it owns and on my WordPress install. I have Simple Facebook setup to publish to my profile's fan page.
I edit a recently published post and find that the Facebook Publisher has informed me that there is either some bad java script or a plugin in conflict with it, and it can not display buttons. I try cleaning the post of all Java Script. I disable all plugins but Simple Facebook. Nothing works.
I log into Facebook, and switch out of my Fan Page profile into my personal profile. Then I go back to WordPress and reload the post editor. Facebook Publisher is working fine.
I believe this is a bug. I don't like the idea of me forgetting to log back into my personal profile (which is setup not to post) and having everything break on my WordPress install.