installing wxPython demo on Debian unstable

I'm using Debian unstable with everything installed through the
packaging system (apt). It seems that wxPython2.5.3 is installed
alongside python-2.3.5.

I don't seem to be able to find a package for the wxPython demo
software and sourceforge only offers a 2.5.3.1 source download which
when run gives the error:

Traceback (most recent call last):
  File "demo.py", line 3, in ?
    import Main
  File "/home/adam/download/wxPython-2.5.3.1/demo/Main.py", line 1007, in ?
    class DemoTaskBarIcon(wx.TaskBarIcon):
AttributeError: 'module' object has no attribute 'TaskBarIcon'

Is this a compatibility issue with the current wxPython install? Any
other advice on this install would be apreciated.

TIA
Adam

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