Confluence also uses Fancybox, this can give issues.
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js"></script> <script type="text/javascript" src="/fancybox/fancybox/jquery.fancybox-1.3.4.pack.js"></script> <script type="text/javascript" src="/fancybox/jquery.mousewheel-3.0.4.pack.js"></script> <link rel="stylesheet" href="/fancybox/fancybox/jquery.fancybox-1.3.4.css" type="text/css" media="screen" />