The sync issues should be resolved now.  You can switch back to using
the normal public repository.

deb http://packages.ros.org/ros/ubuntu lucid main

Sorry for the inconvenience.

 - Ken

On Thu, Feb 2, 2012 at 12:37 PM, Ken Conley <kwc@willowgarage.com> wrote:
> We're currently having an issue with the public repository; apt may
> refuse to install some packages due to a bug we have on our backend.
> While we resolve this, you can instead use ros-shadow-fixed:
>
> deb http://packages.ros.org/ros-shadow-fixed/ubuntu lucid main
>
> Sorry for the inconvenience.
>
> Ken