Well, I understand that if you have choosen this kind of "communication channel" you expect that others will say something. In my opinion, which can be wrong of course, advancing and taking INDEPENDENT provinces is not a hostile action. No matter where those INDEPENDENT provinces are located. Unless of course, your pact was saying something about those INDEPENDENT provinces. Of course you may dislike his movments, but as far as I understand the situation, he makes everything according to the rules.
Also, as far as we used to play, Nations with NAPs CAN fight with each other, but ONly on the INDEPENDET's lands... Saying simply - atack those INDEPENDENT provinces also - there can be only one
Look - with Pangea, Arco has a very clear situation - we have war
ONE MORE THING TO THOSE WHO DONT READ EMAILS:
SERVER HAS BEEN RELOCATED, SO PLEASE, MAKE YOUR MOVES ONCE AGAIN FOR THIS TURN!!!!