This version updates upload so that file versioning is possible. Now attachments to nodes or file metadata can be maintained without having to manually detach/re-attach or reenter metadata when a file of the same path is updated via the upload fieldset. Currently there is no rollback capability.
If you like the idea to try out something "still in development and design" piece of code, then download it and share your thoughts with me (via the feature requests and bug tickets) about the code and the design.