--- teaser_block.module	2008-09-12 23:39:28.000000000 +0200
+++ teaser_block.module.new	2008-09-22 20:33:11.000000000 +0200
@@ -132,7 +132,7 @@ function teaser_block_form_alter(&$form,
       '#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'];
+    array_unshift($form['#submit'], 'teaser_block_node_type_submit');
   }
 }