Primitive Class objects fail to marshal or unmarshal properly:

– Subject is float (float.class)
– Subject is int (int.class)
-etc-

also:
– Subject is interface java.util.Collection (caused by: java.lang.NullPointerException at org.jboss.marshalling.serial.SerialUnmarshaller.bridge(SerialUnmarshaller.java:480)
– Subject is interface java.util.SortedMap
– Subject is interface java.util.List
– Subject is class java.lang.Object
– Subject is interface java.util.Map
– Subject is interface java.util.Set
– Subject is interface java.util.SortedSet
– Subject is interface java.util.RandomAccess
– Subject is interface java.util.Queue

See test suite output for more info