Gazebo Illegal instruction

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Hello

I'm new to ROS and I installed Fuerte on Ubuntu 12.04 (Precise Pangolin) 64bit. The normal examples work well, but gazebo crashes with an illegal instruction error. I get the error with an AMD Phenom II CPU and with an Intel Core 2 CPU as well.

Do you have any ideas?

Thanks Matthias

roslaunch gazebo_worlds empty_world.launch
... logging to /home/abc/.ros/log/67d03dc8-985f-11e1unch-gandalf-21949.log
Checking log directory for disk usage. This may take awh
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://gandalf:48953/

SUMMARY
========

PARAMETERS
 * /rosdistro
 * /rosversion
 * /use_sim_time

NODES
  /
    empty_world_server (gazebo/gazebo)
    gazebo_gui (gazebo/gui)

ROS_MASTER_URI=http://localhost:11311

core service [/rosout] found
Exception AttributeError: AttributeError("'_DummyThread' obje '_Thread__block'",) in <module 'threading'="" from="" '="" usr="" lib="" pyyc'=""> ignored
process[empty_world_server-1]: started with pid [21969]
Exception AttributeError: AttributeError("'_DummyThread' obje '_Thread__block'",) in <module 'threading'="" from="" '="" usr="" lib="" pyyc'=""> ignored
process[gazebo_gui-2]: started with pid [21976]
Gazebo multi-robot simulator, version 1.0.1
Copyright (C) 2011 Nate Koenig, John Hsu, Andrew Howard, and 
Released under the Apache 2 License.
http://gazebosim.org

Dbg pluginPaths and GAZEBO_PLUGIN_PATH doesn't exist.Set GAZEBO_PLUGIN_PATHgre's installation path. ...or are you loading via SystemPlug
Gazebo multi-robot simulator, version 1.0.1
Copyright (C) 2011 Nate Koenig, John Hsu, Andrew Howard, and contributors.
Released under the Apache 2 License.
http://gazebosim.org

Dbg pluginPaths and GAZEBO_PLUGIN_PATH doesn't exist.Set GAZEBO_PLUGIN_PATH to Ogre's installation path. ...or are you loading via SystemPlugins?
Msg Waiting for master.Msg Waiting for master[ INFO] [1336407365.703087291]: waitForService: Service [/gazebo/set_physics_properties] has not been advertised, waiting...

Msg Connected to gazebo master @ http://localhost:11345

Msg Connected to gazebo master @ http://localhost:11345
Illegal instruction (core dumped)
[empty_world_server-1] process has died [pid 21969, exit code 132, cmd /opt/ros/fuerte/stacks/simulator_gazebo/gazebo/scripts/gazebo /opt/ros/fuerte/stacks/simulator_gazebo/gazebo_worlds/worlds/empty.world __name:=empty_world_server __log:=/home/abc/.ros/log/67d03dc8-985f-11e1-92e6-485b395bdd54/empty_world_server-1.log].
log file: /home/abc/.ros/log/67d03dc8-985f-11e1-92e6-485b395bdd54/empty_world_server-1*.log
/opt/ros/fuerte/stacks/simulator_gazebo/gazebo/scripts/gui: Zeile 2: 21980 Ungültiger Maschinenbefehl   (Speicherabzug geschrieben) `rospack find gazebo`/gazebo/bin/gzclient -g `rospack find gazebo`/lib/libgazebo_ros_paths_plugin.so
[gazebo_gui-2] process has died [pid 21976, exit code 132, cmd /opt/ros/fuerte/stacks/simulator_gazebo/gazebo/scripts/gui __name:=gazebo_gui __log:=/home/abc/.ros/log/67d03dc8-985f-11e1-92e6-485b395bdd54/gazebo_gui-2.log].
log file: /home/abc/.ros/log/67d03dc8-985f-11e1-92e6-485b395bdd54/gazebo_gui-2*.log
all processes on machine have died, roslaunch will exit
shutting down processing monitor...
... shutting down processing monitor complete
done