2 nodes cluster:
rhel6-node1 nodeid 1
rhel6-node2 nodeid 2
from Nodes tab -> ask rhel6-node1 to leave the cluster.
the whole cluster is shows as offline.
impossible to start node1 again (see the other bug I filed the other day)
start rhel6-node1 manually
cluster status returns to normal
try to stop node2 -> nothing happens.
*** This bug has been marked as a duplicate of bug 603913 ***