$ python2.4 Forgery.py 

(python2.4:11527): Gdk-CRITICAL **: gdk_window_invalidate_rect: assertion `window != NULL' failed
Traceback (most recent call last):
  File "/tmp/Forgery-0.1.0/ForgeryCommon.py", line 79, in wrap
    return func(*posArgs, **kwdargs)
  File "/tmp/Forgery-0.1.0/ForgeryDocument.py", line 528, in close
    result = self.confirmCloseDialog()
  File "/tmp/Forgery-0.1.0/ForgeryDocument.py", line 483, in confirmCloseDialog
    vsizer.AddSpacer(15)
  File "/usr/lib/python2.4/site-packages/wx-2.6-gtk2-unicode/wx/_core.py", line 11832, in AddSpacer
    return self.Add(*args, **kw)
  File "/usr/lib/python2.4/site-packages/wx-2.6-gtk2-unicode/wx/_core.py", line 11711, in Add
    return _core_.Sizer_Add(*args, **kwargs)
TypeError: wx.Window, wx.Sizer, wx.Size, or (w,h) expected for item
Traceback (most recent call last):
  File "/tmp/Forgery-0.1.0/ForgeryCommon.py", line 79, in wrap
    return func(*posArgs, **kwdargs)
  File "/tmp/Forgery-0.1.0/ForgeryDocument.py", line 528, in close
    result = self.confirmCloseDialog()
  File "/tmp/Forgery-0.1.0/ForgeryDocument.py", line 483, in confirmCloseDialog
    vsizer.AddSpacer(15)
  File "/usr/lib/python2.4/site-packages/wx-2.6-gtk2-unicode/wx/_core.py", line 11832, in AddSpacer
    return self.Add(*args, **kw)
  File "/usr/lib/python2.4/site-packages/wx-2.6-gtk2-unicode/wx/_core.py", line 11711, in Add
    return _core_.Sizer_Add(*args, **kwargs)
TypeError: wx.Window, wx.Sizer, wx.Size, or (w,h) expected for item