i hosted community builder 1.1 on top of joomla 1.5 on helloweb.eu (php version 4.x)
the cb user profile does not work. it show a message like:
Fatal error: Call to undefined function: àÕ^() in /users/r/a/f/raffamaiden/public_html/joomla/components/com_comprofiler/plugin/user/plug_cbmenu/cb.menu.php on line 684
where "àÕ^" are absolutely random letters wich change every time you access the profile
i switched to php5 and this fixed this problem
if you need it, i can run a phpinfo() and post the exact php 4 version