Otiose
Chieftain
anyone else having this problem? The mod runs fine for a few hundred turns and then... blam! ctd one after another, every game 

Yeah, I too get shitloads of CTD in the late game, some that can't be avoided by reloading earlier autosaves either...
I hope the patch helps and that it is released soon.
Do similar crashes occur with FFH2? At the same frequency?
The problems feel like there's a memory leak somewhere in the game DLL and it'd certainly be easier to track down if there were a non-problematic version to diff with.
Here's some tips:
Play on tiny maps, where you can end them in about 4-500 turns
AVOID THE FOLLOWING CIVILIZATIONS:
Austrin, Kuriotate, Dtesh, Jotnar, Scions, Frozen, Basium, Infernal, Doviello, Illians.
Turn off animal invasions and the like
Use No Settlers (Add the amount of civs you want before hand, on a tiny map about 10 will fit easily)