I'm so loved

[DirectorTsaarx]

I'll have to agree with raynor - I think they're maintaining the partnerships purely because you're too far ahead for them to want to fight. I base this on the fact that I had an ally declare war on me within 5 turns of signing a Partnership treaty (and watching the empire's attitude change from Brotherly to Murderous). I think he got upset about all the worlds I'd colonized that he wouldn't get to colonize... Anyway, in the same game, I've maintained a treaty with one neutral empire, even though they're "Murderous" towards me (again, I think they're upset because I colonized a couple worlds in their system ).

[Baron Munchausen]

But they don't TELL YOU why they are angry. That's what's frustrating. Apparently they will not bother to send Messages stating that they claim some system or other that you have colonized unless they intend to actually go to war over it. So you're left to search the "borders" window map or check other things in the game yourself to figure out why they are getting angry.