Until this release, your RSS file was not written out to the Publisher server.
Now, if you do a rendering, it will generate the RSS file and it will be uploaded to your site along with the HTML files.
Next thing to look at -- all the automatically-generated links to the RSS files. They should point to this file, not the one in your Dropbox folder.
This release has support for "watched outlines" as used in the Fargo for Workgroups feature.