I have characters walking a path on a platform above the player, they only have only problem which is obviously a bug of some kind :
If as the player you watch the character walk the path from a position away from the platform, the character will walk continuously and correctly, however if you walk to a position somewhere under a platform and wait for the character to move around the platform - you can hear him walk - when he gets to a position directly above the player he stops and walks on the spot and cant progress. Move away from under the platform and the character contiunues on his journey correctly.
Added to bug list