Marcello>This policy is a de-facto non-policy as the majority of our books are now produced from one specific paper edition. And that is what most producers want. I work very hard to produce a book which is faithful to one paper edition. I would be very disappointed if PG were introducing "improvements" without checking that those "improvements" remain faithful to the edition I created from. Part of the problem with many ebook editions (including commercial ones) is that they *aren't* "faithful" to *anything.* I believe we "lose" books over the course of time by their cumulative divergence from the original (including blind formatting.) Particularly disappointing to me are "guess my mind" "fixes" where someone thinks they have found say a typesetter's error in the book where they can "correctly" guess the mind of the author and fix it. Sometimes you can, sometimes you can't. And sometimes the "repairer" guesses *one* solution to the problem when in fact there could be many.