My hub seems to ignore diaspora comments to threads of a HZ connection - I cannot see it in my stream/HQ, although comments are visible in the source channel's wall. I seem to receive posts from d* connections, though, for what I can tell.
d* addon and d* statistics addon are activated for the hub. d* protocoll installed for the channel.
I remember there was a thread a few months ago regarding this or something similar for d*, but I cannot find it.
