When I install the plugin, everything works fine. But when I then try to add a custom post type, everything falls apart. There isn't even a broadcast box anymore next to the default post types.
Turns out there's a mistake in ThreeWP_Broadcast.php, in the root of the plugin.
Find the function "admin_post_types" on line 381. And replace line 394:
$input_post_types = array(
$input_post_types = array(array(
and also add an extra closing bracket on line 402, so change