I am using the subtitle/artwork download functionality via XBMC - for the series we watch there is hardly the need for subtitles.
I guess this is the biggest problem with Sickrage - it is under constant development with changes being pushed daily. I normally run on the master-branch and only switch to the dev-trunk if there are fixes which have not rolled into master. There was a newznab issue I think over December which they fixed. I switched to Sickrage in August and found it working better than Sickbeard - but then again, I fiddle a lot and this might not be what others want to do
Right, occupational hazard of automatically picking the bleeding edge branch I guess. I tried in mid December, had a look in the code but didn't have much time and didn't see anything immediately obvious. Will try again maybe.