Because I now have more problems after installing service pack 3 I'm thinking of reinstalling the whole cluster.
Additional problem I have is something other people already have. It is described here:
http://social.microsoft.com/Forums/is/windowshpcdevs/thread/6f1384f9-fab0-4544-90ea-85a8ffb87331
Is there a way to somehow reboot the cluster to a clean state? What I mean is to clean every job, every diagnostics, every operations and similar and leave the configuration and users intact?