Strike that. It is a netstat and a OpenSprinkler glitch from what I can tell –
OpenSprinkler glitch because it requires IPv6 to work
netstat because it reports OpenSprinkler is only binding to IPv6 when it fact it is binding to IPv4 and IPv6 both.
I’ve got this running on the old firmware now (didn’t feel like going to the barn to reflash it) – I just had to load the “ipv6” kernel module and I was good to go (other than netstat telling lies about what’s going on). I’ll probably get around to updating the image sometime…