Making older version(s) of attachment less visible (though still accessible) and highlight the newer version more prominently.
When a user uploads an attachment, they can choose to associate it with an existing attachment, thereby creating a new version of an attachment.
Users can view the version history of an attachment.
If a user uploads a file whose name matches the name of an existing attachment, a new version is created automatically.
Undergoing final testing. Will soon be live here.