OK, so I setup Sonarr and added all my existing shows. I then went in to the missing shows and added a dozen or so recent episodes. My sabnzd runs on a separate machine in my LAN (10.0.0.113), which I added and tested. I have the API key from sabnzb filled in.
When Sonarr tries to queue up a file it never appears in sabnzd and after a while the “Downloading” status on the episodes changes to and error “Episode missing from disk.”
If I go back into the settings, Download client, and choose the sabnzbd I setup and client test I get a blue dot and “Testing sabnzbd complete” appears in the popup.
Running under OS X with Mono 4.2