Index: wp-includes/functions.php
===================================================================
--- wp-includes/functions.php	(revision 37393)
+++ wp-includes/functions.php	(working copy)
@@ -4087,7 +4087,7 @@
 
 		// The request is for the admin
 		if ( strpos( $_SERVER['REQUEST_URI'], 'wp-admin' ) !== false || strpos( $_SERVER['REQUEST_URI'], 'wp-login.php' ) !== false ) {
-			$path = preg_replace( '#/(wp-admin/.*|wp-login.php)#i', '', $_SERVER['REQUEST_URI'] );
+			$path = preg_replace( '#/(wp-admin/.*|wp-login\.php)#i', '', $_SERVER['REQUEST_URI'] );
 
 		// The request is for a file in ABSPATH
 		} elseif ( $script_filename_dir . '/' == $abspath_fix ) {