NullPointerException when updating record with extended EntityHome class

[mblanton]

I have this code...

@Name("userHome")
public class UserHome extends EntityHome<User> implements IUserHome {
...SNIP...
        @Override
        public String update() {
                User cUser = userManager.findByEmail(identity.getCredentials().getUsername());
                User lUser = getInstance();
                lUser.setModifiedBy(cUser);
                lUser.setModifiedDate(new Date(System.currentTimeMillis()));
                return super.update();
        }
...SNIP...
}

However, when I use the generated UserEdit page, modified one of the User fields, then click save, I get the following exception:

Caused by: java.lang.NullPointerException
        at org.jboss.seam.framework.Home.updatedMessage(Home.java:55)
        at org.jboss.seam.framework.EntityHome.update(EntityHome.java:65)
        at org.j_commerce.action.impl.UserHome.update(UserHome.java:100)
...SNIP...

If I update my UserHome class to include the following:

        @SuppressWarnings("unchecked")
        @Override
        public ValueExpression getUpdatedMessage() {
                return createValueExpression(messages.get("User_updated"));
        }       

the error goes away.  I have an entry User_updated in my messages_en.properties file:

User_updated=User #{user.email} successfully updated.

Any thoughts as to what is going on?  I'd like to be able to do this without having to override all of the get*Message() methods.

I'm using Seam 2.2.0.GA running in JBoss 5.1.0.GA.