Summary: I have purchased two of these scanners because I was hoping that the first one was defective. It was, and I think the second one was too! The closest I can come to describing the problem is to say that there was condensation under the flatbed glass.
Summary: A significant use for which I bought this scanner was for my wife and me to make copies on my printer using the one-button. I installed it today and, to my dismay, it didn't work. After two hoours on the phone with Canon tech support, Canon gave up and said it won't work with a laser printer.