Whenever I use a ranger device in player/stage I get a warning message saying ---

"stageplugin ranger config describes only the first sensor of the ranger. (/home/.../rtv-Stage/libstageplugin/p_ranger.cc ProcessMessage)"

I am using player ver 3.1.0-svn and stage ver 4.1.1 on Gentoo Linux.

What does this mean and is it something I need to fix somewhere?