To me, the most interesting part of the story is the parenthetical comment at the end:
(Incidentally, because of some of the changes we are being
required to make, we cannot guarantee that Scrivener on the
Mac App Store will have as good support for .docx, .doc and
.odt formats in 2.4.1 and future releases. This does not
affect the version on our site.)
I wonder what's behind this, how it actually affects Scrivener and whether it will hit other apps in the future.