To sum the post up to avoid this in the future : - OP needed to state he used the beta release, which are prone to be in an unfinished state, - Dropbox needs

To sum the post up to avoid this in the future : - OP needed to state he used the beta release, which are prone to be in an unfinished state, - Dropbox needs to be more transparent about their releases, with including proper changelogs (they're only stating "bug fixes and optimisations" in the Dropbox forum). If you're adding/changing the UX in some way, document it. If you want a feature to be developed discretely, make a private beta, but still - document it. It's an opportunity to learn something from this.