[Master Belisarius]

I don't know if this is the case (in fact I believe that's a bug). But some games, doesn't allow to save the turns in middle (for example Emperors of Fadding Suns).
The problem is that some players (the word cheater come to me), like to save the game do their moves, and if the result is bad for them (for example if their ships found a minefield), then, reload the game.
IF the save option is disabled, still you can do the cheat, but you need to play everything again...