Index: wp-admin/index.php
===================================================================
--- wp-admin/index.php	(revision 7275)
+++ wp-admin/index.php	(working copy)
@@ -82,6 +82,7 @@
 }
 
 $post_type_text = implode(', ', $post_type_texts);
+$post_type_text = ( empty($post_type_text) ) ? __('0 posts') : $post_type_text;
 
 // There is always a category
 $sentence = sprintf( __( 'You have %1$s, contained within %2$s and %3$s.' ), $post_type_text, $cats_text, $tags_text );