Twice in my current game (3.17 + Solver's 0.15), I have as a voting member (running Free Religion) Defied an AP resolution. Each time I checked a large (15+) city on the following turn, and there was NO additional unhappiness! 
Undocumented 3.17 change, or what? Can others confirm my experience?

Undocumented 3.17 change, or what? Can others confirm my experience?