ubuntu-bug can not report bug on Xubuntu 10.04 LTS Lucid 64-bit

[Nikola M]

sudo ubuntu-bug xfce4-weather-plugin
[sudo] password for nikola:
Traceback (most recent call last):
  File "/usr/share/apport/apport-gtk", line 368, in <module>
    app.run_argv()
  File "/usr/lib/python2.6/dist-packages/apport/ui.py", line 553, in run_argv
    return self.run_report_bug()
  File "/usr/lib/python2.6/dist-packages/apport/ui.py", line 369, in run_report_bug
    self.collect_info(symptom_script)
  File "/usr/lib/python2.6/dist-packages/apport/ui.py", line 769, in collect_info
    icthread.exc_raise()
  File "/usr/lib/python2.6/dist-packages/apport/REThread.py", line 34, in run
    self._retval = self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib/python2.6/dist-packages/apport/ui.py", line 84, in thread_collect_info
    not apport.packaging.is_distro_package(report['Package'].split()[0])) \
  File "/usr/lib/python2.6/dist-packages/apport/packaging_impl.py", line 134, in is_distro_package
    for line in open(f):
IOError: [Errno 2] No such file or directory: 'firefox'

I have re-installed firefox 3.6.23 from official repository and still no help using ubuntu-bug.