@westamastaflash, thanks for the savegame, I'll look at it at some point and will figure out what exactly is wrong then.
Good point. This is due to the game trying to be smart in the civics screen (well, it actually works in BtS). I'll either replace this with the pedia wording or try to make it actually smart.Some of the info for the civic is rather misleading, however. Not only does the Civilopedia entry state that Arete gives +20% Great Person Birth Rate in Cities with State Religion, but mousing over it on the Civics screen show that it gives +20% Great Person Birth Rate in Cities with your particular state religion. E.g. if your state religion is Octopus Overlords, it it shows that Arete gives +20% Great Person Birth Rate in Cities with Octopus Overlords. Even though it also says "Reqs Runes of Kilmorph".