I heard that in the new update our save files won't work. Is there anything new on the earlier stages in game? Like, some changes on the story or character interactions. It would be good to know if there is anything new.
The only save-breaking bug I'm aware of is what NCrow said - the turn-based combat super late in the game, added in 0.4.0 and 0.4.1 (slimes and wolves)