Obviously my original reply to this thread was posted before we discovered the bug that Tina just linked to for you. Some things just slip through the net, no matter how much we test. So thanks for all the feedback, it helps us nail down these hard to capture bugs!
Although I should also mention that, because we had no way to edit the pedestrians' path data, we weren't able to fix peds who sometimes run through large accessories (barriers, containers etc.). I was able to delete peds, but all I got rid of were the ones that we knew couldn't be killed by Electric Blue. So there's still some occasions where, in a standard car, you might fail to see a ped who's currently hidden inside a large accessory. Sorry 'bout that!