Normandy file error messages

[Bioman]

I just started a new game and when I load my opponents turn I get a number of messages saying that the scenario.map, scenario.oob, scenario.pdt and the nation.dat files have been altered. The scenario is the #0611_03: Le Hamel - The Salient. He just purchased the game and I doubt he is changing any of the files and I know that I have not done so.

Has any one else run into this problem or something similar? Any suggestions?

Nick