diff -r -u date.orig/includes/date_plugin_display_attachment.inc date/includes/date_plugin_display_attachment.inc
--- date.orig/includes/date_plugin_display_attachment.inc	2009-09-16 16:08:39 -0500
+++ date/includes/date_plugin_display_attachment.inc	2009-09-16 16:10:40 -0500
@@ -21,14 +21,16 @@
 
   function options(&$display) {
     parent::options($display);
-    $display->display_options['style_plugin'] = 'date_nav';
-    $display->display_options['items_per_page'] = 0;
-    $display->display_options['row_plugin'] = '';
-    //$display->display_options['defaults']['style_plugin'] = FALSE;
-    $display->display_options['defaults']['style_options'] = FALSE;
-    $display->display_options['defaults']['items_per_page'] = FALSE;
-    $display->display_options['defaults']['row_plugin'] = FALSE;
-    $display->display_options['defaults']['row_options'] = FALSE;
+    if (is_object($display)){
+      $display->display_options['style_plugin'] = 'date_nav';
+      $display->display_options['items_per_page'] = 0;
+      $display->display_options['row_plugin'] = '';
+      //$display->display_options['defaults']['style_plugin'] = FALSE;
+      $display->display_options['defaults']['style_options'] = FALSE;
+      $display->display_options['defaults']['items_per_page'] = FALSE;
+      $display->display_options['defaults']['row_plugin'] = FALSE;
+      $display->display_options['defaults']['row_options'] = FALSE;
+    }
   } 
 }