[mod_python] apache log_error

In using the log_error function, I'm not seeing any messages from 
python in the apache log when I use apache.APLOG_DEBUG or 
apache.APLOG_NOTICE.  All other warning levels higher than that seem to 
make it into the output ok.  (I see other debug messages from apache, 
and my LogLevel is set to debug, and PythonDebug is On).  Can anyone 
else confirm this?
This is on Mac OS X / Apache 2.0.48 / mod_python 3.1.2b

Thanks,
Oliver