pop-up login doesn't respond- mootools conflict?

Unfortunately, we can't help you here. You're using the fb:fan tag, which has been deprecated by Facebook and replaced with the fb:like-box tag. While the fb:fan tag still works (and is much, much more configurable, we agree), we won't be implementing it simply because Facebook can remove, or change, it's functionality at any time.. and that's something that makes for angry users.. it's happened to us before.

I would recommend continuing to use it, because of the obvious advantages, but check on that section of your site frequently, just in case it breaks one day.

However, all is not lost with our recommendation above. You should be able to safely remove the call to load the Javascript file /templates/jv_asent/js/fb.js, which in turn, loads the Facebook Javascript library. JFBConnect already loads that code, so the script above is just duplicating it (and adding the extra code/time mentioned above).

Hope this helps, and good luck with your site!