I recently started playing KSP after a break and the new patch. When I loaded the game, it stopped running, froze, and when I attempted to re-load the game I found that my save files had gone missing from the menu. After manually locating them and suspecting corruption, I made a new save game. The new save game -- default -- did not appear on the menu. In effect I cannot save any game. Weirdly, when I tried to save a new default game I was given an overwrite warning.
I do not appear to have an output log.
I am currently running Ubuntu.