Have also had them happen during several other fresh games as well, so not map-specific.
I've also had it happen with only Resource Monitor mod installed.
As unpredictable as the crashes are, I didn't really feel like starting a vanilla-only game just to test for the crash, since it usually is hours before they start, and often hours between.
Logs show no errors, nor do they show the close messages.
Currently using Treefarm, Rail Layer, Resource Monitor, and a homebrew variation of Treefarm's AlienSeed. Mod directory zipped up below.
Have managed to find a reproducable method to the crash.
From the latest autosave, I keep crashing while trying to finish a belt between an oil field to the south, and my main pump farm in the north.
Actually, I'm pretty sure you could do anything other than just stand around and it will crash.
Just standing in one spot does not invoke the crash. (A lot of the hours on that save are actually me testing to see if it would occur over time)
I've had a CTD probably a dozen times during this game. Typically just starting it back up and loading the last autosave works well enough, and only costs me up to 10 minutes.
I managed to circumvent a stubborn CTD like this before by going back 2 autosaves and picking something entirely different to do for awhile.
Latest save: https://dl.dropboxusercontent.com/u/535 ... eeplay.zip
Autosave prior to problem: https://dl.dropboxusercontent.com/u/535 ... osave2.zip
Entirety of mods directory: https://dl.dropboxusercontent.com/u/53563248/mods.zip
Entirety of factorio current log
Am sad b/c this save is farthest I've gotten since the liquids were introduced. Though, it's also my first serious game that I pushed through the CTDs for since then as well.