[ros-users] ros installation, help please

Dear all
I am trying to install ros on a freshly installed ubuntu maverick. I did
this already twice successfully on other machines, but now I the
installation seems to be broken. Please forgive this perhaps rather naive
question from a industrial designer with little programming experience who
is overwhelmed with the potential of ROS, openni and kinect since only one
week. You guys do a very important work and I am deeply impressed by the
whole ros project.
Kind regards
Mischa

mischa@ubuntu:~$ sudo apt-get install ros-cturtle-base
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
  ros-cturtle-base: Depends: ros-cturtle-ros-tutorials (=
0.2.3-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-geometry-tutorials (=
0.1.0-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-joystick-drivers-tutorials (=
1.2.1-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-point-cloud-perception (=
0.3.2.5-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-slam-gmapping (=
1.2.2-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-joystick-drivers (=
1.2.2-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-ros (= 1.2.4-r6927~maverick) but it
is not going to be installed
                    Depends: ros-cturtle-visualization (=
1.2.2-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-camera-drivers (=
1.2.6-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-vision-opencv (=
1.2.5-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-rx (= 0.0.1-r6927~maverick) but it
is not going to be installed
                    Depends: ros-cturtle-image-pipeline (=
1.2.2-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-sound-drivers (=
1.2.0-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-simulator-stage (=
1.2.2-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-image-common (=
1.2.0-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-common-tutorials (=
0.1.0-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-imu-drivers (=
1.2.1-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-visualization-common (=
1.2.0-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-physics-ode (=
1.2.7-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-laser-drivers (=
1.2.2-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-roslisp-support (=
0.2.10-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-common-msgs (=
1.2.2-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-robot-model (=
1.2.3-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-visualization-tutorials (=
0.2.0-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-laser-pipeline (=
1.0.2-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-simulator-gazebo (=
1.2.7-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-geometry (= 1.2.0-r6927~maverick)
but it is not going to be installed
                    Depends: ros-cturtle-common (= 1.2.1-r6927~maverick) but
it is not going to be installed
                    Depends: ros-cturtle-driver-common (=
1.2.3-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-diagnostics (=
1.2.3-r6927~maverick) but it is not going to be installed
                    Depends: ros-cturtle-navigation (= 1.2.3-r6927~maverick)
but it is not going to be installed
E: Broken packages

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