I believe you are referring to Stateless Session beans...right?
I was reading a while back that one of the differences between the local and remote interface is how to handle method calls.
For instance, in local interfaces, when you call a method passing another object as a parameter, you pass the reference of the object,
when you use remote interfaces, you pass the object as a value (i.e. a copy of the object)
Since Stateless beans are taken from the pool and then released, i think what they are trying to say, is that
you should not take
the reference of the bean you are using and passing it to another object to use that reference later.
You can use it, however, during the immediate call chain, which i believe it means that you can use it, while the called method is running...
so, if you call a method, that call another method, you should be ok to pass to the second method, the reference of the stateless bean, but
this should last only for the current call. Subsequent calls should not refer to the previous Stateless bean...
This is just my interpretation...sometimes i find Specifications kind of cryptic ;)
Dave