Hi John, thank you for your feedback: I've taken the time to rewrite the example (issue1) using the python logging system. I came up with: import logging logging.basicConfig(level=logging.DEBUG, format='%(asctime)s %(levelname)s %(message)s', filename='/tmp/myapp.log', filemode='w') logging.getLogger('').setLevel(logging.DEBUG) loggerSub = logging.getLogger('A.B.C') loggerSub.critical('CRITICAL test, should be shown and should create the sublogger') logging.getLogger('').setLevel(logging.WARNING) loggerSub.debug('WARNING test, should not be shown cause we have changed to WARNING') which only logs the first line but not the second one 2009-02-03 11:14:52,058 CRITICAL CRITICAL test, should be shown and should create the sublogger hackage hslogger does clone the priority setting for A.B.C (in getLogger). The cloned value is no longer affected by when changing the top level logging priority. So this example makes hackage hslogger log both lines. So I consider this a beeing a (small) bug. Sincerly Marc Weber