It's an issue with your z-indexing. The topbar div is on top of the FB button and has a higher index (2 vs 0), so it's covering up a part of the button. It seems like you tried to fix this by putting a z-index of 10 on the facebook-login div, but that's not the right spot to do it.
If you add the following to your CSS file, it should work (is for me, at least):
dev.zegenie.com/templates/rt_mynxx_j15/css/template.css, line 28
#header {
padding: 5px 0 7px;
z-index: 10; <-- Add this
}
Good luck, and let us know if you have any other questions!
Facebook login cursor behavior
