Safari Version 5.1.1 (6534.51.22) on mac here. Logged out. This is HTML source here:
Code:
<div class="container_12 clearfix">
<section class="grid_12" id="main">
<div class="grid"></div>
<div id="system-message-container">
</div><div class="cb_template_default"><div class="componentheading">Rejoignez-nous !</div><div class="contentpaneopen"><div class="cb_comp_outer"><div class="cb_comp_inner cbHtmlEdit cbRegistration">
Maybe there is a cookie you have that is causing this ?
It could actually be any other extension doing that by outputing an empty message to joomla, not necessarily CB or CBSubs. Actually, CB uses that system-message only on page redirects, so if you didn't come to homepage by a redirect, it's probably not CB or any CB Team CB plugins.