Index: wp-includes/update.php
===================================================================
--- wp-includes/update.php	(revision 11110)
+++ wp-includes/update.php	(working copy)
@@ -27,8 +27,11 @@
 	$php_version = phpversion();
 
 	$current = get_transient( 'update_core' );
-	if ( ! is_object($current) )
+	if ( ! is_object($current) ) {
 		$current = new stdClass;
+		$current->updates = array();
+		$current->version_checked = $wp_version;
+	}
 
 	$locale = apply_filters( 'core_version_check_locale', get_locale() );