yup even my save files don't work which is bad since i was doing a "see everything" route and i have 21 save files and i reached like day 1300 and now (if it doesn't get fixed) i have to do everything again! how beautiful ;)
(if you wondered i was weight stage 8 so no i hadn't finished the game yet, but i did reach the ending on the first time i played it which was like at least 1 year ago)