Yep, this is caching!

Strange, you're seeing a 403 from a main Question/Show page? We're not seeing anything like that in the logs for your account in the last week. If you see it again, would you take a screenshot, please? It could be our load balancer config is having issues.

We're going to require that images are hosted on our i.stack.imgur subdomain, so hopefully they won't randomly disappear.

I couldn't find anything else network-wide matching "sansom". Up to Greg to give us a little more info :)

What was the title of the question you asked yesterday? Or can you find it here?

@ErikA I checked into what happened. You changed IP addresses a few times right when starting your answers, which looks to have prevented certain spam prevention measures from completing. As Anna said, you were just lucky :)