Either changing to wxSelection (normal drop-down without the ability to type) or maybe reading the follwing:
http://lists.wxwindows.org/cgi-bin/ezmlm-cgi?11:sss:24612:200312:klbchmkfgdl...
The first post is: --- I figured this out from one of my users. If you create a combobox without specifying a value and then call GetValue(), wx coredumps. It works fine on Windows and Linux.
cb=wx.ComboBox(panel, -1, style=wx.CB_DROPDOWN, choices=["1", "2", "3"] print cb.GetValue()
The above coredumps. Adding "" as a parameter after -1 fixes it. ---
You could try adding the following row after row 78 (in the CVS version) in Mattricks/MatchPrediction.py (just after the initialization of the wxComboBox):
cb.SetSelection(3)
this may help, if I read the post correctly.
/Oscar