qtile-cffi crash

gistfile1.txt

2014-08-06 21:47:27,289 ERROR _xpoll:623 Got an exception in poll loop
Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/qtile-0.7.0-py2.7.egg/libqtile/manager.py", line 610, in _xpoll
    r = h(e)
  File "/usr/lib64/python2.7/site-packages/qtile-0.7.0-py2.7.egg/libqtile/manager.py", line 839, in handle_ButtonPress
    self.cmd_focus_by_click(e)
  File "/usr/lib64/python2.7/site-packages/qtile-0.7.0-py2.7.egg/libqtile/manager.py", line 814, in cmd_focus_by_click
    self.currentGroup.focus(self.windowMap.get(wnd), False)
  File "/usr/lib64/python2.7/site-packages/qtile-0.7.0-py2.7.egg/libqtile/group.py", line 161, in focus
    l.focus(win)
  File "/usr/lib64/python2.7/site-packages/qtile-0.7.0-py2.7.egg/libqtile/layout/max.py", line 42, in focus
    self.group.layoutAll()
  File "/usr/lib64/python2.7/site-packages/qtile-0.7.0-py2.7.egg/libqtile/group.py", line 102, in layoutAll
    self.currentWindow.focus(warp)
  File "/usr/lib64/python2.7/site-packages/qtile-0.7.0-py2.7.egg/libqtile/window.py", line 511, in focus
    hook.fire("client_focus", self)
  File "/usr/lib64/python2.7/site-packages/qtile-0.7.0-py2.7.egg/libqtile/hook.py", line 232, in fire
    (event, args, kwargs)
UnicodeEncodeError: 'ascii' codec can't encode characters in position 69-70: ordinal not in range(128)