Och, great..., so I don't have to ask myself if my saves from bug v 0.18 will work for me here...There is a LOT more to these save issues.
However every time I have seen it...and the types of errors I see in SS...points to variable change along with DC's co stant modifying of the engine.
Ren'Py is good...but can be very flakey.
The error I got when trying to load my save from 18 into 18.1 was clearly a variable change of some sort. It freaked out because DV changed something with pregnancy variable.