Why would you disable this on the first place? The issue you linked has a fairly complete explanation on why it exists, and unless save actually fails (e.g. no free space, failure to rename to the source or other errors). If really Caja is showing those file for a longer time, I see two possibilities: the save failed and the file was left around (either a safety feature or a bug in GIO), or the file has been renamed and there's a bug in Caja not noticing.