I'm playing around with the new pathfinding feature and I'm running into an odd problem. I'm working off of the Turret Defense demo. I moved the walls around to fit on a simple background image I've created. There is an area in the upper center of the screen (I'm guessing an area that's about 150x200 pixels) that causes the pathfinding to stop working if I place a wall there. I'm guessing that the walls somehow "block" the pathfinding but I'm not sure how. The target is in the center of the screen. If I move the target down about 200 pixels it begins to work again. Is there some kind of setting that I may be missing?