Ok, so this is officially a bug.
See my earlier post (#28) for an idea of what I'm talking about. I've done some testing to figure this out, and it appears that if you successfully convert your last civilization while you are at war with them, then the religious victory will not trigger. That was the problem with my original save.
In my original game, France and Norway declared a joint war against me about two turns before I finally converted France. (I had previously converted all of the other civs, and was in the process of converting France when they declared war.) They didn't have much of a military, and they certainly weren't doing anything about my apostles in their territory, so I just kept "spreading religion" until they converted in turn 165. At that point, the religious victory screen indicated that 7/7 civs were now following my religion. (The 8th civ, England, was eliminated much earlier on.) However, I never got the religious victory. I played two more turns to see if it would ever trigger, and it didn't.
After seeing so many other players post a successful victory, I figured that it couldn't be anything with the original save or the setup of the game. So I tried to imagine how my game could have been different. The only thing that came to mind was that I was at war with the French when I converted them as my last civ.
To test my theory, I went back to a save of the game from two turns before they declared war on me. I then played from there. (This was not for any sort of official GOTM submission... I was just trying to verify whether this was a bug.) Sure enough, two turns later (turn 163), the French and Norwegians declared their joint war. THIS time, I decided to keep my apostles at bay until such time as I could make peace. At the first opportunity (ten turns later), I asked for peace with the French and got it. I then sent my apostles to convert their two cities, and voila - I won a religious victory on turn 173. That save is posted below as "Second Playthrough - Convert After War". If you open that save, sue for peace, and then convert their cities, you'll get the religious victory.
I then wondered if, in my original game, I kept playing until such time as I could get peace with the French, would it automatically give me the religious victory at that point. The answer, sadly, is no. I am now at turn 174, have been at peace for two turns, have all 7 civs converted, and I haven't won. That save is posted below as "Post-war - no religious victory". It would seem that the only way to win a religious victory at this point would be to wait until another civ converts enough cities back to their original religion, then send my apostles to convert them back to my religion. I'm not actually sure that that would work, as I didn't have the patience to wait for all of that to happen... it could take 50 turns or more.
So I have two questions/issues for the moderator:
(1) The larger issue here is the bug in the game which prevents a religious victory if the last civ that you convert is one that you happen to be at war with during the time of the conversion. I have to believe that this is a bug, because if it isn't, then all you would have to do to prevent an AI (or human opponent in multiplayer) from winning a religious victory would be to declare war with them and never make peace. However, since this is a GOTM that has not reached its end-date for submission, I didn't want to post these saves in the Bug Reports forum. If you feel that it would be better to do so now, then please, by all means, use my posts to create a new thread there. If it is better to wait, then please feel free to do so once this GOTM is over.
(2) The not-as-big issue is what you would like me to do for my GOTM submission for this month. I can assure you that it was a turn 165 win with a score of 290. (It's certainly not going to earn a record.) I've posted that save as well so that you can check on the score, and also see that all civs are converted to my religion, but the game didn't trigger the religious victory.
Anyway, at a minimum, I wanted to at least make others aware of this particular religious victory bug.