Phil Fish's Polytron today released a much-needed patch for their controversial indie hit Fez.

Fez was in development for over haf a decade, but it was still chock full of bugs and glitches, which the patch apparently addresses.

Unfortunately, it also addresses players' saved games, turning them corrupt and causing players to lose all their progress in the game, which has been out for months.

"THE PATCH IS KINDA BROKEN," Polytron tweeted earlier today. "Reports of savefile corruption. We advise against installing it unless you already can't play the game."

Then, later, on their website: "There is an issue that seems fairly widespread where the save file can be seen as corrupted by the game after installing the patch. We’re floored that this wasn’t found in testing."

They recommend clearing your system cache (which deletes all downloaded updates, but not saved games) to try to fix the issue, though failing that, they say, you're SOL.

Did you already download the patch? Experience any save issues? Surprised that Polytron has screwed up once again? Tell us in the comments or on Twitter.