I installed roundup 1.1.0 with Python 2.3. I experience
a problem.

exception_message function of mailer module use
traceback.format_exc() to get formated exception
infomation. format_exc is only provided by python 2.4.
roundup document sad roundup will run with python 2.3
or above.

You should use
"\n".join(traceback.format_exception(sys.exc_type,
sys.exc_value, sys.exc_traceback)) for python 2.3.