Great, could you also make sure the Helix package, even when its moved to extras, do not handle 'rpm' files in Firefox. I hate it when I try to download stuff and instead get a helix player started in the browser.
I think here Helix is not guilty, the problem is happen when the web server is badly configured and use a wrong MIME type (audio/x-pn-realaudio-plugin), so Firefox consider the file being multimedia and launch the default player.
-- nicu
