Last night I downloaded the development version, to see if it was more stable for me. It was, I had no problems, until Turn 237 of my Egyptian game.
2. Ramesses II-Turn 237: I hit return and got Python exceptions. Reloaded Turn 236, advanced to 237, hit return. More Python exceptions, then a CtD. The next three reloads of Turn 237 went straight to CtDs when I ended the turn.
I went back to Turn 232 and took another run at it.
3. Ramesses II-Turn 235: The first time I went through Turn 235, nothing happened until a CtD when ending Turn 237. Then, the second time I reloaded 232 and went forward again, I got a weird message after advancing from Turn 235 to 236, about Byzantine cities wanting to flip and rejoin their empire, should I let them? Weird, because all my cities were Egyptian, and the message didn't specify which cities wanted to go. I said "Yes, let them go." Nothing happened. No flips, no DoW. I proceeded on to a CtD on Turn 237. Another load from 232. This time when I hit Turn 236 I got Python exceptions, apparently related to Byzantium respawning. I reloaded from 232 again, advanced. No problems on Turn 236 -- no message, no Python exceptions, nothing.
I am betting that the Turn 235 problem won't replicate for you, but I do have Turn 232 if you want to look at it.