I've not tested the update myself yet, but maybe people with errors are overwriting the files instead of doing a clean installation? This has caused me problems in the past with track updates (eg phantom cones in the road, that sort of thing).I'm sorry to hear that the track doesn't work for you, but unfortunately I have no solution to offer at the moment. It's a fairly simple and basic track system, so I don't know where could the error be. For most of the people, it seems to work okay.