Crash when moving cursor left

[David Clymer]

I cannot trigger the bug when there is no text in the box, however, after I have typed a character, whenever I attempt to move the cursor left, I get the following error:

Focus Widget <lyntin.ui.urwidui.CommandEdit object at 0x1e943d0> at position 573 within listbox calculated cursor coords (14, 0) but rendered cursor coords (15, 0)!
Traceback (most recent call last):
  File "/home/david/Development/personal/lyntin.dc/lyntin/ui/urwidui.py", line 1106, in main
    self.focus_window(self.focus)
  File "/home/david/Development/personal/lyntin.dc/lyntin/ui/urwidui.py", line 1059, in focus_window
    self.windows[name].draw()
  File "/home/david/Development/personal/lyntin.dc/lyntin/ui/urwidui.py", line 900, in draw
    self.ui.draw_screen( self.getSize(), self.getCanvas() )
  File "/home/david/Development/personal/lyntin.dc/lyntin/ui/urwidui.py", line 904, in getCanvas
    return self.frame.render( self.getSize(), self.ui )
  File "/home/david/Development/personal/lyntin.dc/lyntin/ui/urwid/widget.py", line 85, in cached_render
    canv = fn(self, size, focus=focus)
  File "/home/david/Development/personal/lyntin.dc/lyntin/ui/urwid/widget.py", line 1976, in render
    focus and self.focus_part == 'body')
  File "/home/david/Development/personal/lyntin.dc/lyntin/ui/urwid/widget.py", line 121, in finalize_render
    canv = fn(self, size, focus=focus)
  File "/home/david/Development/personal/lyntin.dc/lyntin/ui/urwid/listbox.py", line 342, in render
    raise ListBoxError, "Focus Widget %s at position %s within listbox calculated cursor coords %s but rendered cursor coords %s!" %(`focus_widget`,`focus_pos`,`cursor`,`c_cursor`)
ListBoxError: Focus Widget <lyntin.ui.urwidui.CommandEdit object at 0x1e943d0> at position 573 within listbox calculated cursor coords (14, 0) but rendered cursor coords (15, 0)!