I paste the feed URL into my RSS reader and it returns no site found. I am using the feed address that Nabble provides on my forum. I have tried this with NewsNetWire and Digg. The URL does work with Firefox and OSX Mail.
I know, I should be happy with Firefox or OSX Mail. But Firefox doesn't display the member name and OSX Mail is rendered in clunky mails, one for each post and reply (Uggh).