I am not sure if Simbin are fully aware of a new problem with replays since the recent patches. When you go to run the replay, you get the message "this replay contains cars or tracks not available" or something very similar. I have seen this reported a few times ar RSC lately, but I have also started experiencing it regularly, and from different servers. It is not related to custom skins, because it has happened regularly in races where only default skins were used. It is not just an issue with one computer either, as I have exchanged a replay from someone else who couldn't get it to work, and it produced the same message on my system as well. Very frustrating, it never occurred prior to recent patches.