AWT plays some games during serialization in the way it handles event
listeners. It only saves those event listeners that are serializable
and ignores the others.

We need to document this behaviour as part of the java.awt.Component class.
It is a fairly important part of the class's serialization behaviour,
but isn't obvious from either the docs or the code and tends to surprise
people. See also the comments section.

KGH 10/12/97