ROS answers seems to be down, there's only a "502 bad gateway" error visible. http://www.isup.me/http://answers.ros.org/ ros.org in general is up and working. Best regards, -- Armin Hornung Humanoid Robots Lab, Albert-Ludwigs-Universität Freiburg Contact: http://www.informatik.uni-freiburg.de/~hornunga