As of April, iPhone and iPad developers will no longer be able to make on-the-fly changes to the "What's New in This Version" text in App Store listings, or even those pages' support and marketing URLs.
Altering any of those fields will now require submitting an app update, according to Apple. The change was announced via iTunes Connect, the portal developers use to manage their App Store content.
Apple hasn't said why the change was necessary, but presumably the company caught some developers abusing the system. Conceivably, for instance, a developer could submit a legitimate-seeming app but then change text and URLs to promote a scam.
The new arrangement could prove inconvenient for honest app makers, preventing them from correcting/updating information that's separate from new binaries.