Submitter:
Long desciption: Describe as exactly as you can what you did when this error occurred. If you give no description at all, you make it very difficult to track down this bug. You should replace this text with your description, and also remove the "bug-tag" in the bottom of this text so that this bug is not automatically sorted among the bug reports with no description. (bug-tag: NO_DESCRIPTION)
Solfege version3.8.0
runtime.has_gtkhtml2False
gtk.pygtk_version(2, 8, 6)
gtk<module 'gtk' from 'C:\Program Files\GNU Solfege\library.zip\gtk\__init__.pyc'>
sys.version_info(2, 3, 5, 'final', 0)
sys.version2.3.5 (#62, Feb 8 2005, 16:23:02) [MSC v.1200 32 bit (Intel)]
sys.prefixC:\Program Files\GNU Solfege
sys.platformwin32
windowsversion(5, 1, 2600, 2, 'Service Pack 3')
Message from stderr:

Traceback (most recent call last):
  File "src\mainwin.pyc", line 457, in <lambda>
  File "src\app.pyc", line 217, in practise_lesson_id
  File "src\app.pyc", line 208, in _practise_lesson_id
  File "src\abstract.pyc", line 92, in set_lessonfile
  File "src\statistics.pyc", line 245, in lessonfile_changed
  File "src\statistics.pyc", line 127, in load_statistics
  File "pickle.pyc", line 1390, in load
  File "pickle.pyc", line 872, in load
KeyError: '\x00'