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SP, based on the "::1>Python-urllib/2.5" and SB and CP not installed, I had the theoretical hyptohesis that it could be SABnzbd itself that - by some misconfiguration - is accessing it's own API URL. So I verified that by putting http://localhost:8080/api?blabla into the ... RSS settings, but that didn't fool SAB
So: hypothesis not proven (neither true, neither false)