Xyth, did you ever find the cause of Great Prophets not founding religions when by rights there should be a 100% probability? In my latest game, the world's first three Great Prophets were all born on the same turn, but only one of them founded a religion. It's usually only mildly annoying when it happens to an AI (especially one you haven't met yet), but can be potentially game-wrecking when it happens to the player.
I'm rewriting that code entirely for 1.21. I know it's a real nuisance but at this point I'd rather spend my limited modding time getting 1.21 finished, rather than trying to solve and patch an elusive bug in 1.20 that's going to be excised anyway.
So this happened.
Is there anything I can do to prevent it? Didn't cause a crash or anything, the game carried on OK.
Caused by a broken movie definition. In general, anytime you see something magenta like that - or in the case of units, red hemispheres - it means I've made an error specifying the location of an art file. Usually harmless, but some can cause a crash (for example, should you see a building or unit with a magenta button in the pedia, never try to build it in a city). I think I've already fixed the Etemenaki for 1.21, but I'll double-check. Always appreciate reports on these things though.