Quick question - is there a reason why the method getThrowable() is not part of the IThrowableProxy interface? ThrowableProxy has it but since it's not part of the interface I need to cast to ThrowableProxy to access it. Purpose here is in a custom AppenderBase implementation, where I want to do some special processing if the ILoggingEvent has a throwable in it. I see that the IThrowableProxy provides its own methods of returning information about the underlying throwable object, but I've already got an existing library to handle the throwable object in the way I need to. It's not a huge deal (as said casting IThrowableProxy to ThrowableProxy does the trick) but it seems like it should be part of the interface. Thanks! Richard Sand | Managing Director PO Box 91824 | Austin | Texas 78709-1824 | USA Office: +1 888 612 8820 ext 02 | Fax: +1 866 304 3754 Mobile: +1 267 984 3651