The first few times I played, a handy web of diplomatic relations would show up on this screen. E.g., two AIs would be shown to be at war with each other, etc. But now (post-patch and playing on a higher level), all that shows are my diplo relationships, not any b/t the AIs. Is this a problem with the patch, a function of the higher level (regent), or some feature that I have unknowingly disabled? I will appreciate any help.

Make sure you're using the 'new' v1.16 patch as opposed to the 'old' v1.16 patch. I had the same problem with the old, incorrect patch.

Thanks for the tip Shirley. I'll give that a shot tonight...