Eitan,

Here attached the yaml files I used for the test.

I tried unsubscribing and resubscribing the inflated_obstacles topic within
rviz, yet the inflation is still there after resubscribing. 

I also tried subscribing the unknow_space, and here are the results:
/move_base/NavfnROS/NavfnROS_costmap/unknown_space, no message can be
received after subscribing;
/move_base/global_costmap/unknown_space, no message can be received after
subscribing;
/move_base/local_costmap/unknown_space, although messages received, I didn't
see anything shown on the screen.
http://ros-users.122217.n3.nabble.com/file/n2440742/yaml.tar.gz yaml.tar.gz 

best regards
xiaojun
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