I've been experiencing very frequent desyncs since updating to hotfix 6 (both players have the hotfix). Any chance something was introduced? Is there any information I can provide to help debug?

Does rolling back to 5 solve it? I want to pinpoint the exact hotfix.

I'll give it a try as soon as schedules line up. We're both busy dads and we usually game one night a week. Looks like it's just the CvGameCoreDLL.dll to roll back.

Yep, and if that's true, that is exactly what I'll do, as the changes in it are insignificant enough to roll back.

Hey Walter, just to update you, before trying the rollback I tried a reinstall, just in case I had messed something up when working on my own mod. It appears to have fixed the desync, so it must have been my mistake, rather than patch 6.

Well, scratch that. Desyncs returned and then persisted after rolling back CvGameCoreDLL.dll

Ugh. Now I have no clue what's happening at all. Are you sure all the players have the exact same version of everything?

I had lots of desyncs in MP with 3 players and I managed to lower the frequency significantly by activating all the lohs in Civilization4.ini on all computers. The turns take longer time, but the game runs fairly stable at a 5Mb save file.