Grass wxpython gui won't start

[manuel.deljesuspe@…]

When launching GRASS, the starting window to select the map works fine. However, once the location has been chosen, wxpython gui fails to start. It throws the following error:

/opt/local/share/grass-6.4.2/etc/wxpython/wxgui.py:1614: wxPyDeprecationWarning: Call to deprecated item 'InitAllImageHandlers'. 
  wx.InitAllImageHandlers()
Traceback (most recent call last):
  File "/opt/local/share/grass-6.4.2/etc/wxpython/wxgui.py", line 1721, in <module>
    sys.exit(main())
  File "/opt/local/share/grass-6.4.2/etc/wxpython/wxgui.py", line 1714, in main
    app = GMApp(workspaceFile)
  File "/opt/local/share/grass-6.4.2/etc/wxpython/wxgui.py", line 1605, in __init__
    wx.App.__init__(self, False)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/wx-2.9.4-osx_cocoa/wx/_core.py", line 8631, in __init__
    self._BootstrapApp()
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/wx-2.9.4-osx_cocoa/wx/_core.py", line 8196, in _BootstrapApp
    return _core_.PyApp__BootstrapApp(*args, **kwargs)
  File "/opt/local/share/grass-6.4.2/etc/wxpython/wxgui.py", line 1657, in OnInit
    workspace = self.workspaceFile)
  File "/opt/local/share/grass-6.4.2/etc/wxpython/wxgui.py", line 130, in __init__
    self.notebook  = self._createNoteBook()
  File "/opt/local/share/grass-6.4.2/etc/wxpython/wxgui.py", line 253, in _createNoteBook
    self.goutput = goutput.GMConsole(self)
  File "/opt/local/share/grass-6.4.2/etc/wxpython/gui_modules/goutput.py", line 233, in __init__
    self.MakeSearchPaneContent(self.searchPane.GetPane())
  File "/opt/local/share/grass-6.4.2/etc/wxpython/gui_modules/goutput.py", line 329, in MakeSearchPaneContent
    self.search = SearchModuleWindow(parent = pane, cmdPrompt = self.cmd_prompt)
  File "/opt/local/share/grass-6.4.2/etc/wxpython/gui_modules/ghelp.py", line 107, in __init__
    self._layout()
  File "/opt/local/share/grass-6.4.2/etc/wxpython/gui_modules/ghelp.py", line 113, in _layout
    gridSizer.AddGrowableCol(1)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/wx-2.9.4-osx_cocoa/wx/_core.py", line 15380, in AddGrowableCol
    return _core_.FlexGridSizer_AddGrowableCol(*args, **kwargs)
wx._core.PyAssertionError: C++ assertion "!m_cols || idx < (size_t)m_cols" failed at ../src/common/sizer.cpp(1956) in AddGrowableCol(): invalid column index

grass and py27-wxpython-devel are installed from macport with the standard variants selected.