Out of Sync

Hi, I'm playing with a friend of mine online. We started out as a Lan game (on my pc and my laptop) and we had no problems there, but then we continued over the internet and every so often we get an Out of Sync error, while nothing special happens (no event on either side etc.).
When we reload the game it is fixed for a couple of turns.

We already tried reinstalling the mod.

Actually, yesterday it was way better. We played for 40 or 50 turns and nothing happened. Today it was over after 2 turns.

There's a thread about OOS issues in the main part of the FfH forum.

There's also a known issue "when a human Infernal player captures and keeps a city" which will be fixed in 0.40, in case that's the problem.

Well, I can confirm that as of 0.4 it still doesn't work. Even worse, we get OOS on turn 1 and crash to desktop