" some people apparently have the opinion that you shouldn't respond unless you have a specific, substantive thing to say"
Yeah I hope that's not where we're at. There's a balance somewhere. When someone asks a question and I don't have an answer or know where to look for it I don't usually respond because I feel like my reply would divert/ get in the way of the member getting their answer. There's no real rule about it. But if people are following that etiquette it might look like no one cares. I think the list folk are pretty helpful and responsive. So if no one answers it's probably because no one currently reading knows. Not a technical issue. -- John.