error message - help?

Hello All,
I was just wondering if anyone would be able to help me with this message -

<paste>
Traceback (most recent call last):
  File "./upstream.py", line 37, in ?
    (options, args) = parser.parse_args()
  File "/usr/lib/python2.4/optparse.py", line 1278, in parse_args
    stop = self._process_args(largs, rargs, values)
  File "/usr/lib/python2.4/optparse.py", line 1322, in _process_args
    self._process_short_opts(rargs, values)
  File "/usr/lib/python2.4/optparse.py", line 1429, in _process_short_opts
    option.process(opt, value, values, self)
  File "/usr/lib/python2.4/optparse.py", line 710, in process
    return self.take_action(
  File "/usr/lib/python2.4/optparse.py", line 731, in take_action
    parser.print_help()
  File "/usr/lib/python2.4/optparse.py", line 1536, in print_help
    file.write(self.format_help())
  File "/usr/lib/python2.4/optparse.py", line 1525, in format_help
    result.append(self.format_option_help(formatter))
  File "/usr/lib/python2.4/optparse.py", line 1508, in format_option_help
    result.append(OptionContainer.format_option_help(self, formatter))
  File "/usr/lib/python2.4/optparse.py", line 992, in format_option_help
    result.append(formatter.format_option(option))
  File "/usr/lib/python2.4/optparse.py", line 273, in format_option
    help_text = self.expand_default(option)
  File "/usr/lib/python2.4/optparse.py", line 245, in expand_default
    return option.help.replace(self.default_tag, str(default_value))
AttributeError: '_Helper' object has no attribute 'replace'
</paste>

This is after running script -h.  It's kind of wierd because the
script doesn't break when executed with another option. :s If
interested, you can have a look at the source -
http://svn.sourceforge.net/viewvc/upstream/upstream-base/upstream.py?revision=9&view=markup

Thanks in advance for any help.

Regards,
Mahangu

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