weird crash with pymouse

[Guillaume Rene]

Exception in thread Thread-1 (most likely raised during interpreter shutdown):
Traceback (most recent call last):
  File "/usr/lib/python2.6/threading.py", line 532, in __bootstrap_inner
  File "pymouse.py", line 139, in run
  File "/usr/lib/pymodules/python2.6/Xlib/ext/record.py", line 238, in enable_context
  File "/usr/lib/pymodules/python2.6/Xlib/ext/record.py", line 215, in __init__
  File "/usr/lib/pymodules/python2.6/Xlib/protocol/rq.py", line 1428, in __init__
  File "/usr/lib/pymodules/python2.6/Xlib/protocol/rq.py", line 1440, in reply
  File "/usr/lib/pymodules/python2.6/Xlib/protocol/display.py", line 547, in send_and_recv
  File "/usr/lib/pymodules/python2.6/Xlib/protocol/display.py", line 639, in parse_response
<type 'exceptions.TypeError'>: 'NoneType' object is not callable

Sometimes this Exception appears. The mouse remains functional but pymouse.py shutdowns.

[Guillaume Rene (guillaume-rene)]

seems to only happen to me when time.sleep is removed in pymouse.py ? Does it happen all the time to you ? At program closing ? Does it interrupt the program ?