Hello all, Subsequent to comments and discussions on this list, I have modified the LoggingEvent class to be an implemetnation of ILoggingEvent interface. LoggingEvent class is no longer serializable. Instead, the responsibilty for serialziation is assumed by another ILoggingEvent implementation called LoggingEventVO. In a similar vein, the ThrowableProxy class now implements the IThrowableProxy interface. However, it is no longer serializable. The responsibility of serialization has been moved to another class called ThrowableProxyVO which also implements the IThrowableProxy interface. The internal structure of ThrowableProxy has been altered to closely resemble that of a Throwable. The code is still in a flux. Expect further small changes and bug fixes. Your comments or questions are welcome. -- Ceki Gülcü Logback: The reliable, generic, fast and flexible logging framework for Java. http://logback.qos.ch