[teach]

Such a thing would have been very helpful to me. My domain's SSL cert expired and I got a new one but didn't notice that my provider had shipped a different, newer intermediate certificate.

For three weeks I was showing a great big THIS CONNECTION IS UNTRUSTED screen to Firefox users and didn't know it.

[relix]

It surprises me how common it is, which made me build Domainsquire to fix it. As today's event shows it even happens to the big boys, and this is a predictable, pre-emptively solvable downtime event, so it really shouldn't happen.