Testing web UI of 10.2.1RC3
User admin shares folder AdminPhotos with user jwtest with share, create, delete permissions, but without change permission:

User jwtest does not see a rename button on files within AdminPhotos (no change permisision, ok). But user jwtest has a rename button on subfolders within AdminPhotos.

Actually trying a rename results in an error then.
This is inconsistent. Either always have the rename button and show errors, or never have the rename button.