Dave on Nostr: Nah, that is how castopod works and it's fine. The 415 is likely something inside ...

Nah, that is how castopod works and it's fine. The 415 is likely something inside Castopod responding negatively to the Accept header our poller sends. Something unique to that install. I haven't had time to look yet, but activity-pub really needs the right Accept headers to be sent, and Castopod is heavily AP based.