When an episode is purged (at the server end) from an RSS feed, it is not removed unless the feed is completely reset, which is very inconvenient. Even if the server sends an HTTP 410 response (Content Gone) to a download request, the app tries to download it still (and instantly says it timed out). A 205 response (Reset and Retry) just loops several times before failing. If set to only download one episode at a time, this causes the feed to stop entirely, stuck on the now non-existent episode. I have verified that RSS Sync is enabled; new episodes appear fine, so it's certainly being read okay.