Index: /home/jens/src/web-workspace/ungpirat.6/modules/teaser_block/teaser_block.module
===================================================================
--- /home/jens/src/web-workspace/ungpirat.6/modules/teaser_block/teaser_block.module	(revision 206)
+++ /home/jens/src/web-workspace/ungpirat.6/modules/teaser_block/teaser_block.module	(working copy)
@@ -125,6 +125,8 @@
 function teaser_block_form_alter(&$form, &$form_state, $form_id) {
   if ($form_id == 'node_type_form' && isset($form['identity']['type'])) {
     $types = variable_get('teaser_block_types', array());
+    
+    // Adding an extra field
     $form['workflow']['teaser_block'] = array(
       '#type' => 'radios',
       '#title' => t('Teaser blocks'),
@@ -132,7 +134,8 @@
       '#options' => array(t('Disabled'), t('Enabled')),
       '#description' => t('Enables teaser blocks for this content-type.'),
     );
-    $form['#submit'] = array('teaser_block_node_type_submit') + (array)$form['#submit'];
+    
+    $form['#submit'][] = 'teaser_block_node_type_submit';
   }
 }