My MX510 mouse started to get this high pitched whining sound coming from the actual mouse, I can hear it even from an arms length away. I have used it for over 3 months, so I could no longer return it to amazon.com where I bought it. I called Logitech Customer Support and the guy decided to give me an RMA. Appearently, they are sending me a new mouse in 10-12 business days and I can keep the old mouse. I know Logitech is an excellent company, but this sounds too good to be true. Will anyone care to tell me about their experiences with Logitech's RMA?