Index: wp-includes/rewrite.php
===================================================================
--- wp-includes/rewrite.php	(revision 9624)
+++ wp-includes/rewrite.php	(working copy)
@@ -1518,7 +1518,7 @@
 		}
 
 		// robots.txt
-		$robots_rewrite = array('robots.txt$' => $this->index . '?robots=1');
+		$robots_rewrite = array('robots\.txt$' => $this->index . '?robots=1');
 
 		//Default Feed rules - These are require to allow for the direct access files to work with permalink structure starting with %category%
 		$default_feeds = array(	'.*wp-atom.php$'	=>	$this->index .'?feed=atom',
Index: wp-includes/version.php
===================================================================
--- wp-includes/version.php	(revision 9624)
+++ wp-includes/version.php	(working copy)
@@ -15,6 +15,6 @@
  *
  * @global int $wp_db_version
  */
-$wp_db_version = 9300;
+$wp_db_version = 9621;
 
 ?>