MDMurphy writes "Got this in the email just now. Despite reports I'd read that you had to write Amazon and ask for a refund if you saw they charged others a lower price, it seems they are letting their customers know proactively: Greetings from Amazon.com. Thank you for your recent purchase from our DVD store. As you may be aware, we occasionally test various aspects of our web site--design, layout, and other features--for brief periods to determine how they resonate with customers. Recently, we tested the discounts we offered on selected DVDs, so that different discounts for certain titles appeared to individual customers chosen at random. Because you placed an order for the DVD "The Big Blue - Director's Cut" during this period, we wanted to let you know that we will be refunding the difference between the price you paid and the lowest test price that we offered on that DVD during the test period, in your case, $1.49. We also wanted you to know that if we conduct any price tests in the future, all customers who order items affected by these tests will automatically be refunded any price difference at the conclusion of the test, thereby ensuring that they will pay the lowest available price. We value your business and appreciate the trust you have placed in us by being a customer. Thank you for shopping at Amazon.com." You can see another news report about the havoc the "experiment" has played on things.