Index: /mods/wpsg_mod_productindex.class.php
===================================================================
--- /mods/wpsg_mod_productindex.class.php	(revision 7448)
+++ /mods/wpsg_mod_productindex.class.php	(revision 7450)
@@ -382,6 +382,7 @@
 			
 			/* Erweiterung fÌr KompatibilitÀt mit Customer Fields */
-			if ( $_POST['post_type'] != 'post' && $_POST['post_type'] != 'page' ) return; 
-			
+			//if ( $_POST['post_type'] != 'post' && $_POST['post_type'] != 'page' ) return; 
+		    if (isset($_POST['post_type']) && $_POST['post_type'] != 'post' && $_POST['post_type'] != 'page' ) return;
+		    
 			if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) return;