The RPC Server is unavailable

I was just looking through my server logs and found a large number of search requests coming via Google for The RPC Server is Unavailable, the reason you will have found me through this search is because of a very old rant, indexed by Google on the older incarnation of this site and can be read here.

However, I doubt that the RPC errors that people are seeing are related to my very-ex-webhost, and if you have come here because of seeing RPC errors on your computer then you might like to check out here, here or here.