I am having a major issue with GC3 that makes it unplayable, and it started when patch 1.2 came out. I have started a few different games and had the same results.
The AI WILL NOT: Declare war on me, no matter our relationship.
Declare war on each other, no matter their relationship.
Strategically attack each other even when I have caused them to go to war via trade screen.
At best, I can get the AI to attack each other's fleets if they are already in range of each other and are already at war via my trades.
When it looks like the AI wants to declare war and attack me, they send their fleets in range of my fleets and do nothing else, and it seems like they do no not do this with each other. Check out my fleet picture- half the galaxy is in my territory and doing nothing.
I play on Godlike. Please help! Or please patch!
Fleets : http://imgur.com/Hhj4CDZ 
Diplomacy: http://imgur.com/jZeYDoe
(I declared war on Krynn, they still never attacked me)