Changes to this message: Returned to user operation The MPP cluster has been returned to user operation; we believe that the main cause for the recent instabilities has been fixed. We also have implemented some software measures to prevent high numbers of job losses; this may lead to cluster nodes being taken offline should they get into an unusable state, but should be otherwise without visible effect. This information is also available on our web server http://www.lrz-muenchen.de/services/compute/aktuell/ali4174/ Reinhold Bader