My friend and I played via the internet (without any wireless connecitons) a campaign multiplayer game. After a couples of hours, the game crashed saying synchronization error. After that, we couldn't continue our game OR even load it back (because we've saved a couple of times!)!!
Why did it happen? I think it is unacceptable that so much time can be invested in ... a total lost of time!
It even more frustrating since I was winning