Ok, just a bit of a change to how these are included to prevent the warnings. Before when you'd include them it would start out like this:

Code
define('UBB_MAIN_PROGRAM',1);

That should be:

Code
if (!defined('UBB_MAIN_PROGRAM')) define('UBB_MAIN_PROGRAM',1);
$style_side="";$tbopen="";$tbclose="";

The instructions on how this is done will be updated in the beta 5 control panel.