Exception AttributeError from '/usr/lib/python2.7/threading.pyc' when RUSCORE start!

edit

Hi friends!

i don't know anything about PYYYTHo0o0o0oN :-s

what am i should to0 do0 whit these exceptionS?

(i have ROS FUERTE)

tnQ

mohsen@mohsen-ThinkPad-R500:~$ roscore
... logging to /home/mohsen/.ros/log/6d9214a4-a0f9-11e2-bd04-00216b5b4a7c/roslaunch-mohsen-ThinkPad-R500-4942.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://mohsen-ThinkPad-R500:57850/
ros_comm version 1.8.10

SUMMARY
========

PARAMETERS
 * /rosdistro
 * /rosversion

NODES

auto-starting new master
Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
process[master]: started with pid [4958]
ROS_MASTER_URI=http://mohsen-ThinkPad-R500:11311/

setting /run_id to 6d9214a4-a0f9-11e2-bd04-00216b5b4a7c
Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
process[rosout-1]: started with pid [4971]
started core service [/rosout]