Select "Show hidden".
Select the last package in the list
Deselect "Show hidden":

IndexError: list index out of range
Traceback:

File "Wapplication.py", line 45, in mainloop
      self.do1event(mask, wait)
File "FrameWork.py", line 194, in do1event
      self.dispatch(event)
File "FrameWork.py", line 227, in dispatch
      handler(event)
File "FrameWork.py", line 289, in do_mouseDown
      handler(partcode, wid, event)
File "FrameWork.py", line 836, in do_inContent
      self.do_contentclick(local, modifiers, event)
File "Wwindows.py", line 336, in do_contentclick
      widget.click(point, modifiers)
File "Wcontrols.py", line 241, in click
      Wbase.CallbackCall(self._callback, 0, self.get())
File "Wbase.py", line 684, in CallbackCall
      return callback()
File "PackageManager.py", line 386, in updatestatus
      installed, message = self.getstatus(sel)
File "PackageManager.py", line 316, in getstatus
      pkg = self.packages[number]

Mac OS X 10.3.1, MacPython 2.3