You can see and ride on the rail car that contains this sign at the Western Railway Museum in Rio Vista, CA.
Basically, we're trying to make our caching routine a tiny bit smarter so that we can better anticipate requests before tens of thousands of you make them. The problem is that it is easier to make it quite a bit dumber if we don't make it exactly right. We appreciate your patience and your eagle eyes to let us know today if this change will work or if we need to pull it back.
In other news, all our servers are back on grid power now. Woo! Thanks to all the unseen and unsung who made that happen in New York - those people are working really hard to make the rest of our lives as seamless as possible.