I have the following mapping
@Entity
@Table(name = "av_contribution")
public class Contribution {

.....

@CollectionOfElements(targetElement = BoardKind.class)
@Enumerated(EnumType.STRING)
@JoinTable(name = "av_contrib_boardkind", joinColumns = @JoinColumn(name = "cid"))
Set<BoardKind> boardKinds = new HashSet<BoardKind>();

.....

When I do a merge of this entity I get:

java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Enum
at org.hibernate.type.EnumType.nullSafeSet(EnumType.java:134)
at org.hibernate.type.CustomType.nullSafeSet(CustomType.java:146)
at org.hibernate.persister.collection.AbstractCollectionPersister.writeElement(AbstractCollectionPersister.java:755)
at org.hibernate.persister.collection.AbstractCollectionPersister.insertRows(AbstractCollectionPersister.java:1364)
at org.hibernate.action.CollectionUpdateAction.execute(CollectionUpdateAction.java:56)

Using hibernate 3.2.5.ga

Any help greatly appreciated!