StatefulBean passivation is broken (ClassCastException in org.jboss.ejb3.stateful.NestedStatefulBeanContext)

StatefulBean passivation is broken, because there is a conflict between what gets serialized (attribute contains) and what gets unserialized (attribute beanMO).

11:41:37,109 ERROR [STDERR] Caused by: java.lang.ClassCastException: java.util.ArrayList
11:41:37,109 ERROR [STDERR] at org.jboss.ejb3.stateful.NestedStatefulBeanContext.readExternal(Neste
dStatefulBeanContext.java:60)
11:41:37,109 ERROR [STDERR] at org.jboss.serial.persister.ExternalizePersister.readData(Externalize
Persister.java:72)
11:41:37,109 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.readObjectD
escriptionFromStreaming(ObjectDescriptorFactory.java:411)
11:41:37,109 ERROR [STDERR] at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.objectFromD
escription(ObjectDescriptorFactory.java:81)
11:41:37,109 ERROR [STDERR] at org.jboss.serial.objectmetamodel.DataContainer$DataContainerDirectIn
put.readObject(DataContainer.java:639)
11:41:37,109 ERROR [STDERR] at org.jboss.serial.persister.ObjectInputStreamProxy.readObjectOverride
(ObjectInputStreamProxy.java:68)
11:41:37,109 ERROR [STDERR] at java.io.ObjectInputStream.readObject(ObjectInputStream.java:333)
11:41:37,109 ERROR [STDERR] at java.util.ArrayList.readObject(ArrayList.java:592)
11:41:37,109 ERROR [STDERR] ... 74 more