v.152 update causes game to stutter regularly

I just loaded up the expansion with all its system overhauls and such, but every 10 seconds the game stutters, freezing for about 5 seconds, then lets me play for another 10 seconds, then freezes for about 5 seconds... and so on. I tweeted to the @HinterlandGames twitter account about it, but figured that I should make a post here, too.

I was able to play the game fine up until this point, and I don't know what it might be apart from the update. Changing the graphical settings has had no noticeable effect on the issue.

For completion's sake, here is my system info:

Did you try turning off the Steam Overlay? That often helps fix it.

That appears to have worked, thanks. Annoying that the issue cropped up, but as long as there's a simple work-around...