This is very strange. BUG only mucks around with Python and should not be able to cause a crash in the C++ layer like this. Are you running other SDK mods at the same time (BULL or BAI)? Can you please post a saved game that crashes, especially if it's one turn before the crash?
I have only BBAI 1.0 and Blue Marble. The crashes are not deterministic, they hapen around every 5th turn on average. And it crashes during user interaction; not during end turn phases. Sometimes it crashes when moving a unit, sometimes when changing the taxes, can't reproduce a crahs, but they'll come
.
Don't know if there are incompatibilities with runtime versions (I work as a C++ developer and have different studios installed.
I'll try a single player game next game (on holiday now) to see if it is only a multiplayer team problem.