I’ve seen reports of corrupt or missing saves but not, I think, since Fez’s initial PC release. There’s also a wider range of bugs being reported and that does go with PC’s territory.

For what it’s worth, the 1.04 patch is giving a few Steam players trouble with a new high CPU usage/overheat bug. Perhaps this is why the updated isn’t yet available on G.O.G.?

Still it’s a bit of a shame that G.O.G doesn’t have 1.04: Afflicted Steam players are stuck at least until version 1.05 is released, but G.O.G players can roll the game back if necessary --this of course, is one of G.O.G.’s strengths over Steam.