Repeatable error on end turn (r974), something related to revolutions, no crash though.
Didn't reproduce for me, but the call stack was enough to find what looks like the problem, so I have made a change that I think **SHOULD** fix it. Since it was reproducible for you (I don't have all the optional assets you do, which might make the difference) please check against the latest DLL (rev 976) and see if the behaviour has changed for you.