Something on your page is re-including the Facebook Javascript API, and then initializing it incorrectly. If you open the HTML on your page, and search for "all.js", you'll see it twice. The first is from JFBConnect (correct) the next looks to be from a fan-box module (incorrect).
You should remove the 2nd inclusion of the Facebook Javascript library (the all.js code, and everything around it). JFBConnect has it's own JFBCFan module (or you can use the {JFBCFan} tag. While you aren't required to use it, and we work with others... the others can't include the Javascript library, or 'bad' things like what you're seeing will happen.
Hope that helps, but if you have any other questions, just let us know!
Alex