Index: og_user_roles.module
===================================================================
--- og_user_roles.module	(Revision 3217)
+++ og_user_roles.module	(Arbeitskopie)
@@ -2616,7 +2616,7 @@ function og_user_roles_ognodeadd() {
      og_set_group_context($group_node);
   }
 
-  $type = $_GET['type'];
+  $type = str_replace('-', '_', $_GET['type']);
 
   if ($type) {
     // Got this from node.module (node_access)
@@ -2632,7 +2632,7 @@ function og_user_roles_ognodeadd() {
     if ($access === TRUE) {
       
     // Working on this issue: http://drupal.org/node/183096
-      $content_type = node_get_types('type', str_replace('-', '_', $type));
+      $content_type = node_get_types('type', $type);
       $output = '<p>'. filter_xss_admin($content_type->help) .'</p>';
       $output .= node_add($type);
     }