I'm not sure if this is a bug or just a misunderstanding. I posted a comment on the wiki page for the plug-in but I'm not sure how often that gets checked and is appropriate:
On the project and build pages, a list of URL(s) is displayed for each deployed artifact. From the source code:
Isn't the URL on the Jenkins master at .../deployedArtifacts/download/... always invalid? What is the purpose? It seems that users will click on this can get confused by the HTTP 404 error.