I'm just adding another voice to a recent problem (I assume, since last update) - when tracking, the proper locations show up on the map, but the line is not continuous; i.e., between tracking points, the connecting line goes to some point off-screen, then back to the next tracking point. The tracking log appears correct. I suppose you could say the line is continuous, but goes to some unknown location between actual tracking points, rather than from one point to the next. Hope this helps in your problem solving.