Hey hugbug,
I noticed that the RSS checking on failed RSS seems to be connected to the Download Queue Retries and RetryInterval for failing article requests. I think it default on 10x and 10 s. But when the rss has issues, and is not available for like a minute or 2 or so, nzbget keeps hitting it. Maybe it is a good idea to seperate this from eachother, so an RSS retry and interval, and one for the articles.
greetz!