Ticket #8590: 8590.diff

wp-includes/update.php

@@ -27 +27 @@
         $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() );