Dear Pymol developers,

I have recently installed pymol 1.6.x in MAC OS X 10.8.2 and have the following error while opening the GUI

Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/pmg_tk/__init__.py", line 35, in run
    PMGApp(pymol_instance,skin).run(poll)
  File "/Library/Python/2.7/site-packages/pmg_tk/PMGApp.py", line 325, in __init__
    self.runSkin()
  File "/Library/Python/2.7/site-packages/pmg_tk/PMGApp.py", line 251, in runSkin
    self.skin.setup()
  File "/Library/Python/2.7/site-packages/pmg_tk/skins/normal/__init__.py", line 3661, in setup
    self.createInterface()
  File "/Library/Python/2.7/site-packages/pmg_tk/skins/normal/__init__.py", line 3634, in createInterface
    self.balloon = Pmw.Balloon(self.root)
  File "/Library/Python/2.7/site-packages/Pmw/Pmw_2_0_0/lib/PmwBalloon.py", line 28, in __init__
    Pmw.MegaToplevel.__init__(self, parent)
  File "/Library/Python/2.7/site-packages/Pmw/Pmw_2_0_0/lib/PmwBase.py", line 982, in __init__
    super().__init__(parent, tkinter.Toplevel)
TypeError: super() takes at least 1 argument (0 given)

As a result it never opens the "The Pymol Molecular Graphics System" window. Can anyone help to find out what might be wrong. 

Thanks
Rhitankar

--
Rhitankar Pal
Postdoctoral Researcher,
Dept of Chemistry, Yale University
New Haven, CT 06511