private void RefreshArtworkFor (Feed feed)
{
if (!String.IsNullOrEmpty (feed.ImageUrl) && !CoverArtSpec.CoverExists (PodcastService.ArtworkIdFor (feed))) {
Banshee.Kernel.Scheduler.Schedule (new PodcastImageFetchJob (feed), Banshee.Kernel.JobPriority.BelowNormal);
}
}