I'm in the middle of this unusually long email conversation with Logitech email support right now over my 4 month old MX Revolution not working. After waiting 5 days, I finally got a response (after sending the second email, of course). Here's some choice quotes after the first few emails of standard "troubleshooting" procedure that obviously went nowhere. Gotta love the crap companies try to pull on customers who may not know any better...I was being a dick because I didn't want to restart my PC..well, I didn't even want to drag it out so I could plug in a new mouse. And obviously if I was using vmware fusion (hate dualbooting), then it would most likely have been unacceptable. The above conversation also happened in just over half an hour. Sigh.