Submitter: cri ,, gio ,, tmt ,, alice ,, it
Long desciption: Descrivete con cura cosa stavate facendo quando si è verificato l'errore. In mancanza di descrizione, potrà essere difficile riprodurre l'errore. Sostituite questo testo con la descrizione e rimuovete la riga "bug-tag" in fondo, di modo che questa segnalazione non verrà classificata tra i bug senza descrizione. (bug-tag: NO_DESCRIPTION)

Solfege version	3.19.6
Bzr revision info	branch_nick: build-branch revno: 1851 revision_id: tca@gnu.org-20110405204034-lpfum2jn7xts9phl clean: False
gtk.pygtk_version	(2, 24, 0)
gtk	<module 'gtk' from '/usr/lib/python2.7/dist-packages/gtk-2.0/gtk/__init__.pyc'>
sys.version_info	sys.version_info(major=2, minor=7, micro=2, releaselevel='final', serial=0)
sys.version	2.7.2+ (default, Oct 4 2011, 20:06:09) [GCC 4.6.1]
sys.prefix	/usr
sys.platform	linux2
windowsversion	(not running ms windows)

Message from stderr:

Traceback (most recent call last):
  File "/usr/share/solfege/solfege/esel.py", line 276, in on_link_clicked
    solfege.app.practise_lessonfile(filename)
  File "/usr/share/solfege/solfege/application.py", line 359, in practise_lessonfile
    solfege.win.box_dict[module].on_start_practise()
  File "/usr/share/solfege/solfege/exercises/singinterval.py", line 171, in on_start_practise
    super(Gui, self).on_start_practise()
  File "/usr/share/solfege/solfege/abstract.py", line 547, in on_start_practise
    if getattr(self, 'g_flashbar'):
AttributeError: 'Gui' object has no attribute 'g_flashbar'
Traceback (most recent call last):
  File "/usr/share/solfege/solfege/exercises/singinterval.py", line 203, in new_question
    self.m_t.guessed_correct()
  File "/usr/share/solfege/solfege/exercises/singinterval.py", line 67, in guessed_correct
    self.m_statistics.add_correct(self.m_question[0])
  File "/usr/share/solfege/solfege/statistics.py", line 662, in add_correct
    self._add(answer, answer)
  File "/usr/share/solfege/solfege/statistics.py", line 620, in _add
    assert self.m_timestamp
AssertionError
Traceback (most recent call last):
  File "/usr/share/solfege/solfege/exercises/singinterval.py", line 203, in new_question
    self.m_t.guessed_correct()
  File "/usr/share/solfege/solfege/exercises/singinterval.py", line 67, in guessed_correct
    self.m_statistics.add_correct(self.m_question[0])
  File "/usr/share/solfege/solfege/statistics.py", line 662, in add_correct
    self._add(answer, answer)
  File "/usr/share/solfege/solfege/statistics.py", line 620, in _add
    assert self.m_timestamp
AssertionError