Fez patch causing "fairly widespread" issues with corrupt save files

Fez has been patched, but you may wish to hold off on the update until new issues can be fixed. According to a official post on the matter, after applying the patch, an issue can occur where save files are corrupted after installing the patch. Polytron said it was "floored that this wasn’t found in testing, but for the moment, deleting your system cache should resolve the issue." If that fails, there is no known workaround, so until a solution is found, just hold off on the patch.