Fields of an entity instance are nulled after calling EntityManager.remove() on an instance.
For example, I have an entity class named User. I persist and then remove an instance of User.
// EntityManager em is initialized before the following code
User user = new User();
System.out.println(user.getName); // will print out name1
System.out.println(user.getName); // will print out null (oh no!)
After I persist and remove the same instance of User, it's fields became null. I believe this shouldn't be the case as Section "3.2.3 Removal" of the 2.0 spec states:
"After an entity has been removed, its state (except for generated state) will be that of the entity at the point at which the remove operation was called."