[Dogboy]

Thanks for all the feedback. However, none of us has ever downloaded a mod. In fact, we don't even know how we would do that. We've always played the vanilla game. Three of us in fact installed the game from scratch on new computers to play this scenario. We just patched to 3.21, downloaded the Arduria map I listed above, and I set up host. And, to make matters more mysterious, I played my pretender on this map before, without triggering cheat protection, but I was one of the three players who showed up as "cheating" on turn 0 (i.e., before any of us issued any orders). One of the players is playing on a Mac. Could that be the problem??