For security reasons, we keep file editing disabled in wp-confic. However, a client reported they cannot edit an image; Clicking Edit under a thumb in the Gallery Admin yields a “Cheatin’ uh?” in the popup.
The upload_files permission is what WP uses to determine if the role can add Media. Any other permission name could do, but this seemed a natural fit and allows us to enforce that online file editing stays safely disabled.
Anyway, just requesting this be changed in the next release. Thanks again!