And now my saved games are -disappearing-! I save, exit the game, restart the game, hit "load", and there are no saved games!
Move the mods folder elsewhere, run the game again to see if it saves fine. (this includes the subscribed folder if they're subscribed mods)
Okay, after doing NOTHING, my games are -not- disappearing. I'm still backing up my save files, however. So for now, no problems! Game on!